On July 19, 2026, floodwater tore through Sivasagar, Charaideo, Jorhat and Golaghat districts in Upper Assam. By July 31, the death toll stood at 80, according to the Assam State Disaster Management Authority (ASDMA). More than 2.12 lakh people remained affected, and over 17,000 hectares of cropland lay underwater. Sivasagar, the worst-hit district, accounted for the largest share of the affected population, while neighbouring Charaideo remained among the hardest hit. Thousands of displaced people were still living in relief camps, with many more relying on relief distribution centres, according to the ASDMA’s July 31 report.For most of Assam’s history of floods, the story has followed a familiar script, “The Brahmaputra swells through the monsoon and breaches its banks.” This year, the water that swept through Sivasagar and Charaideo did not come from the Brahmaputra at all but from the hills.Assam floods almost every year, yet the disaster rarely holds national attention for long. Journalists and researchers have repeatedly pointed out that floods here get a fraction of the coverage a comparable disaster elsewhere in India would receive, reduced to a ticker of statistics rather than sustained scrutiny of why it keeps happening. What triggered the floodThe India Meteorological Department ruled out a single cloudburst. What it confirmed instead was sustained, extremely heavy rainfall over an extended period across the upstream catchments in Nagaland and Arunachal Pradesh.That rainfall saturated the Naga Hills and set off massive surface runoff. The south-bank tributaries that feed the Brahmaputra – the Dikhow, Disang, Janji and Dhansiri – swelled rapidly, crossing danger marks well before the Brahmaputra itself had even peaked. In several stretches, water rose higher than the embankments built to hold it back and simply flowed over them. That is why Sivasagar, Charaideo, Jorhat and Golaghat, the districts these tributaries run through, took the major brunt of the disaster.The warning that didn’t arriveOn July 20, Down to Earth reported that Mon district in Nagaland, just across the border from Sivasagar and Charaideo, had received 137 mm of rainfall, against Assam’s typical July daily average of 23-25 mm. That is five to six times the normal rate, recorded in a district whose rivers drain directly into Assam.Other estimates of the same event put the number even higher: Professor Nayan Sharma, an internationally recognised river expert, told The Assam Tribune on July 31 that Mon district saw a precipitation spell of about 239 mm between July 18 and 20, whether the difference reflects different measurement stations or reporting windows, the two figures agree on the essential point: this was an extreme, multi-day rainfall event in the catchment feeding directly into upper Assam.That raises an uncomfortable question, one that commentator Kishor Kumar Kalita posed in Countercurrents: if that much rain was falling for days in a bordering district, why weren’t the disaster management authorities in Sivasagar and Charaideo on alert?India’s early-warning infrastructure runs on the Common Alerting Protocol, implemented nationally through the National Disaster Management Authority’s SACHET platform. Agencies such as the India Meteorological Department and the Central Water Commission generate the underlying rainfall and flood warnings. Those warnings then pass to the State Disaster Management Authority – ASDMA in Assam’s case – which is responsible for authorising and releasing them to the public through SMS, cell broadcast, television and radio. At the district level, ASDMA notifies District Disaster Management Authorities with dedicated officers whose job is to turn a released warning into action on the ground. A warning generated on this system does not automatically reach anyone: each step, from generation to authorisation to district-level response, requires someone to act.The state’s own record of flood alerts, published on the ASDMA website, shows no entry for July 19, the date the upstream rainfall in Mon district was already extreme. If that record is accurate, it means no public warning was released for Sivasagar and Charaideo on the day it would have mattered most. On July 24, the sixth day of flooding, Chief Minister Himanta Biswa Sarma acknowledged that the government could not reach 30% of the flood-affected areas in the Nazira constituency and 20% in Sivasagar constituency. That is a separate admission from the alerting question. Thus, both critical information and emergency assistance failed to reach a substantial proportion of affected communities during the crisis.The question however goes beyond whether a warning was issued on a particular day. According to Mirza Zulfiqur Rahman, a researcher on the Brahmaputra river basin, the region’s disaster management system itself remains fragmented across political boundaries. What is required is a larger, comprehensive model that looks at coordination among disaster management bodies across Assam and also across Northeast India. The mechanisms we usually put in place come only after a disaster has already happened, and are usually band-aid or quick-fix solutions. Rahman argues that flood warning by itself is insufficient. “Timely early warning is what we need. And if we have early warning, we also need to make people aware where they should move for safety. If there is no evacuation plan in place, what is the use of an early warning?” A flood and what it takesI lost my uncle in this flood. On the evening of July 19, in Hulangkatoni, one of the worst-affected areas of Nazira in Sivasagar district, my uncle went out to buy candles. It had been raining all day and the power was out. This is the kind of inconvenience every household in the region learns to live with during the monsoon.On his way home, the water on the road rose with a speed none of us had ever seen there before. The current took him. His body was found three days later.My uncle is not just one in a death toll of 80. Other voices tell us of equally important accounts.The scene on July 23 in Banmukh, Sivasagar, and on July 28 in Ramugaon, Simaluguri. Photos: Lipsa Neog (left) and Dipankar Phukan.Dipankar Phukan, from Ramugaon in Sivasagar, described the night of July 19, when the water reached his family’s house. His mother had gone to check her blood pressure at their neighbour’s house, directly opposite theirs. A cutaway portion of the Dikhow river flows behind that house, and within minutes the water had reached its back room. She gathered the neighbours’ important documents and whatever else she could think to save, and brought their son back with her to their house.By the time she had set the neighbours’ things down and tried to go back for the rest, the water had already crossed the road and reached their house too. She was alone at home. She called Phukan’s brother and told him to come as fast as he could. By the time he reached home, the current was already so strong that he was nearly swept away before people nearby helped him make it inside.Phukan said, “I was on the phone with her. She told me to hang up, that the water was coming, and the call ended. My sister and I don’t live at home, and I was terrified because she was completely alone. I wanted to go to her, but the entire district was underwater by then.”Phukan’s mother’s house became a shelter for those in the region. On the morning of July 20, the National Disaster Response Force brought more people from nearby areas to the house; more than 25 people took shelter there, staying for the next three days because there was nowhere else to go.As of August 1, 10 of them have stayed back because their homes are not inhabitable yet, even though the waters have receded.The Phukans’ car, scooter and furniture was destroyed. “But that wasn’t the part that hurt the most. Our old family photos were destroyed in this flood. After we lost my father, those were the memories of him that we still had. This flood took that from us too,” Dipankar Phukan said.Dipankar’s submerged house, on July 19, at Ramugaon, Simaluguri. Photo: Dipankar Phukan.If the Phukans lost the memories that connected them to the past, Monalisha Kuwar Gogoi from Molagaon, Nazira, lost the harvest that would have sustained them through the year.It was paddy planting season in Assam and Gogoi and her husband had spent the afternoon in the fields, planting rice seedlings. Around 6 pm, on July 19, they walked back home, a little cold in the evening wind. They saw that water had already crept inside their home compound.Initially thinking this is a drain blockage, they eventually heard the water current before they understood what it meant, a rising sound at the edge of the compound. When it arrived, it was with enough force to take everything away with it. Every sack of unhusked rice stored in their house, the family’s entire source of livelihood, was gone. They managed to carry out only two bags of rice and their battery-rickshaw before retreating to a neighbour’s house, where they stayed for the next three days.“When we came back home we cleaned the house, but now we don’t know how we are going to start,” Gogoi said. “All our livelihood is gone, the rice that we sell every year is gone.”Where the sediment comes fromIt is not the rainfall alone, but a slower process that has made Assam more flood-prone with each passing year, whether or not the monsoon itself is unusually heavy.As the Brahmaputra descends from the Himalayas, it carries enormous volumes of sediment – sand, silt and rock debris eroded from young, tectonically active mountains. When the river reaches the flat Assam plains, it slows down and loses the kinetic energy to carry that load. The sediment settles on the riverbed, which rises year after year, shrinking the space available to hold monsoon water. Many of Assam’s embankments were built for a riverbed level that no longer exists. As riverbeds rise and carrying capacity declines, heavy monsoon rainfall is more likely to spill over into surrounding areas than it once was. Roads and houses covered in silt. Photos: Priyakshi Gogoi.But the river’s natural sediment load is only part of the story. According to Partha Jyoti Das, an environmental scientist and specialist on the water-climate-hazard nexus, the rainfall alone does not explain the scale of destruction. He said the catchments in the Naga Hills had already been destabilised due to large-scale deforestation, jhum cultivation, earth cutting, quarrying, indiscriminate and unscientific coal mining, while unsustainable riverbed mining had made the river regime unstable from the upstream hills to the downstream plains.When a three-day spell of very heavy to exceptionally heavy rainfall occurred between July 18 and 20, the already fragile hillslopes succumbed to landslides, resulting in a massive flash flood descending rapidly with large volumes of rocks, sediment, sand and mud. Das said the severity of the flood increased because of the large volumes of debris carried by the floodwaters. Such conditions in a highly degraded hilly area, he said, make flash floods much more devastating than they would be in an ecologically healthier catchment.The mining question This year’s disaster has also sharpened a debate that has simmered in Assam for years: how much of this is nature, and how much of it is us.A civil society group, the Assam Sammilita Mahasangha, has directly blamed years of alleged illegal stone and coal mining along the Assam-Nagaland border with worsening the Sivasagar-Charaideo floods. The group alleges that illegal stone extraction from the Dikhow riverbed disrupted the river’s natural flow, and that abandoned coal pits filled with rainwater collapsed into the river, aggravating the flooding.The allegation isn’t confined to activist circles. Debabrata Saikia, a former MLA and former Leader of the Opposition in the Assam legislative assembly, has separately made a similar claim, blaming illegal mining for worsening the flooding along the Dikhow.This also lines up with a broader pattern researchers have flagged. Dr. Das argues that the effect of upstream land degradation does not end once the floodwater reaches Assam. Progressive increase in sedimentation on riverbeds in the plains has reduced the carrying capacity of many river channels, while degradation of small streams and natural waterways through excessive sedimentation, encroachment and structural obstructions could also have slowed the drainage of floodwaters. Together, he said, these factors increased both the depth and duration of flooding.Professor Nayan Sharma, in his interview with The Assam Tribune, the professor similarly argued that the July floods cannot be explained by rainfall alone. He estimated that Nagaland lost around 800 sq km of forest between 2013 and 2023, increasing surface runoff and soil erosion by 1.5 to 2 times during periods of intense rainfall.Government and technical assessments tend to describe this more cautiously, framing it as excessive excavation reducing a river’s carrying capacity rather than attributing direct blame. Yet both framings arrive at the same underlying fact that what happens in the hills upstream does not stay upstream. None of the evidence presented here suggests that mining or deforestation alone caused the July 2026 floods. Rather, the reporting and expert assessments indicate that they likely interacted with extreme rainfall by increasing runoff, erosion and sedimentation, making downstream flooding more severe than it might otherwise have been. A visual record from Google Earth’s historical satellite imagery reinforces those concerns. Two river-bend chars on the Dikhow River, straddling the Sivasagar–Nagaland border near Simaluguri and close to Bihubar Santak, among the worst-affected localities during this year’s floods show a striking transformation over the past decade.Images from 2014 shows both chars largely vegetated, with only limited exposed sediment and a few disturbed patches along the river margins. By 2018, the extent of bare ground had expanded noticeably, accompanied by an increasing network of access tracks and excavation-like depressions. In imagery from 2021, both islands display extensive cleared surfaces, numerous water-filled pits and dense road networks criss-crossing the chars. By 2024, the disturbed area had expanded further, with visible structures and infrastructure on parts of the excavated land.The historical imagery provides a dated visual record of substantial land disturbance over time in the same reach of the Dikhow River where the Sammilita Mahasangha and Debabrata Saikia allege large-scale stone and sand extraction has taken place. Hydrologist and professor of civil engineering, Indian Institute of Technology Guwahati, Arup Kumar Saikia said to The Northeast Now that, deforestation, mining and other unplanned development in upstream hills can increase water and sediment yield, reducing rivers’ carrying capacity and intensifying downstream floods during extreme rainfall.Google Earth historical imagery (2014–2024) showing the expansion of visible excavation-related land disturbance on chars along the Dikhow River near Simaluguri and Bihubar Santak. Source: Google Earth.What the government has spentSet against the mining and siltation story is the state’s spending record.Assam has not starved flood control efforts of funds. Budgets have committed thousands of crores to embankments, erosion control and other structural flood-management works. The 2026–27 budget allocates Rs 1,670 crore to the Water Resources Department for embankment works, wetland restoration and the Climate Resilient Brahmaputra Integrated Flood and Riverbank Erosion Risk Management Project. In the previous four budgets, the state earmarked Rs 2,778 crore in 2022–23, Rs 2,892 crore in 2023–24, Rs 3,859 crore in 2024–25 and Rs 2,786 crore in 2025–26 for embankment- and flood-control-related works.Budget allocation for Irrigation and flood control. Source: Assam Budget Analysis (from 2022-23 to 2026-27)The Union government has stepped in too, through multilateral financing. The Asian Development Bank has approved $200 million (October 2023) and a further $182 million (February 2026), a combined $382 million, or roughly Rs 3635 crore, specifically for flood and riverbank erosion management along the Brahmaputra. Disaster-specific relief keeps arriving on top of that: Rs 313.69 crore was approved for Assam following the 2024 floods and landslides, and back in 2020 the state sought over Rs 2,642 crore to repair that year’s damage. In the preceding year alone, the Water Resources Department executed 722 kilometres of new embankments, modernised 863 kilometres of existing structures, and implemented 358 anti-erosion schemes covering 456 kilometres. This is not a state that has been sitting on its hands.And yet nearly 4,500 kilometres of embankments already line Assam’s rivers, and this year’s floods happened anyway in districts Sivasagar and Charaideo that had comparatively little history of flooding at this scale before. The spending figures therefore raise a more difficult question than whether Assam has invested enough in flood control. They raise the question of what governments choose to invest in before disasters happen. As Rahman put it: “Paying compensation has become the normal and is easy for the government. The harder thing is to allocate resources to scientific research to map the floodplains and its hazards, social audits of disaster planning, prepare and avoid the damage. They raise the question of whether the state’s flood-management strategy has kept pace with the changing drivers of flood risk.”An analysis in Insights on India, reviewing the 2026 disaster for a policy audience, put the underlying problem plainly; hard structural interventions like embankments along dynamic rivers often provide a false sense of security, and when breached at peak flow, they cause catastrophic high-velocity inundation rather than preventing it.Flood-damaged house in Nepalikhuti, July 31. Photo: Priyakshi Gogoi.The reason is not complicated once you follow the water back to where this year’s flood began. Embankments are built where rivers meet villages – the downstream end of the system. What determines how much water and sediment reaches those villages is decided much farther upstream: how much forest still slows and absorbs rainfall, how much hillside has been cut or mined, and how much sediment degraded catchments deliver into rivers during every monsoon. Embankments can hold back only a certain volume of water. They cannot reduce the runoff and sediment generated upstream before it reaches the plains. None of this makes embankments pointless. None of this makes embankments pointless. Assam’s rivers are shared with neighbouring states and countries, meaning some drivers of flood risk lie beyond the state’s direct control. During the July floods, residents also raised concerns over water releases from the NEEPCO-operated Doyang Hydroelectric Project in Nagaland, highlighting the need for better upstream-downstream coordination. Structural measures therefore remain necessary. But, Das said, Assam’s experience over the past several decades shows that structural measures such as embankments alone are not enough to control flooding. Embankment breaches, he said, have repeatedly triggered and intensified flood damage in many parts of the state. The Wire has written to NEEPCO for comments on the operation of the Doyang Hydroelectric Project during the July 2026 flood, including whether reservoir releases were made during this period. This report will be updated when we receive a response. While flood forecasting and warning systems have improved in recent years, Das said they have not delivered the desired results because vulnerable communities often do not receive warnings in time. In the July 2026 floods, “the element of surprise and suddenness added to the enormity of impact,” he said, because most of the affected areas “didn’t have any such history of major floods in the last three to four decades,” leaving both residents and disaster management agencies unprepared. This also raises a larger policy question. “Floods are not controlled by political or administrative boundaries,” Rahman said. He argued for a bioregional and ecoregional governance model for Northeast India, where changes in land use, watersheds and river systems are monitored and managed together rather than through political boundaries. After decades of increasing expenditure on embankments and flood-control infrastructure, should Assam continue investing primarily in downstream protection, or should greater emphasis also be placed on protecting upstream catchments, regulating activities that accelerate erosion, and coordinating watershed management across state boundaries? This year’s floods suggest that the question is no longer whether Assam spends enough on flood control, but whether its flood-management strategy has kept pace with the changing drivers of flood risk. Both experts point towards a similar conclusion. They argued that non-structural measures and risk-mitigation strategies need to be adopted along with structural measures. Das argues that it needs equal importance, including maintaining upstream catchments in sound ecological health and developing inter-state cooperation with Nagaland, Meghalaya and Arunachal Pradesh for integrated river basin management and upstream-to-downstream flood early warning. Rahman similarly argued that floods cannot be addressed within political boundaries alone and called for a bioregional governance model that manages land use, watersheds and river systems together.Families sheltering in relief camps in Nepalikhuti, July 31. Photo: Priyakshi Gogoi.More dams in the same hillsEven as the state deals with this year’s floods, its own budget for 2026-27 points further in a direction hydrologists would flag as a risk factor rather than a fix.Assam’s 2026-27 budget has allocated over Rs 77,353 crore in planned investments across hydro, solar, thermal and energy storage projects, the largest power-sector investment pipeline in the state’s history, financed through a mix of state resources, centrally sponsored schemes, externally aided projects and public-private partnerships. Within that, the government plans to develop 11 small hydropower projects with a combined capacity of 137.2 MW at an estimated cost of Rs 2,617 crore, at sites including Karbi Langpi, Dhansiri, Disaidam, Desang and Amphi, spread across Karbi Anglong, West Karbi Anglong, Udalguri, Dima Hasao, Sivasagar and Biswanath districts.People collecting relief supplies during the floods, Banmukh, July 26. Photo:Aparajita MahantaThe larger allocation is for pumped storage. The budget proposes 4,900 MW of pumped storage power at a cost of Rs 27,100 crore, with four projects already approved in Karbi Anglong, West Karbi Anglong and Dima Hasao, the same hill districts that feed the Dikhow, Disang and Dhansiri, the rivers responsible for this year’s flooding. Pumped storage moves large volumes of water between upper and lower reservoirs on hill slopes, which means new dam infrastructure, new reservoirs and further construction in terrain already destabilised by mining and deforestation.The same hills flagged for illegal mining, hill-cutting and vegetation loss are now also the site of a new wave of dam and reservoir construction, driven by Assam’s genuine and growing electricity demand. Building access roads, tunnels and reservoirs on unstable slopes typically involves more cutting, blasting and soil disturbance activities that hydrologists have long warned can increase erosion and sediment transport. In already degraded catchments, these processes could further amplify flood risk during periods of extreme rainfall.A pattern that repeatsLine up the last few years and a pattern is hard to miss. In 2020, floods hit 30 of Assam’s 33 districts between May and September, killing over 100 people and affecting more than 50 lakh. The 2025 monsoon affected over 6.3 lakh people. This year has already killed at least 78 and displaced roughly seven lakh, with over 900 villages submerged. Each year, officials and headlines call it unprecedented. Each year, it happens again.The pattern goes back further. According to the Assam Water Resources Department’s own account of its history, flood control activity in the state formally began after the 1954 National Policy on Floods, itself a response to what was then called an unprecedented flood. In the decades since, the department’s own records list major floods in 1954, 1962, 1972, 1977, 1984, 1988, 1998, 2002 and 2004 with an average annual loss of around Rs 200 crore, spiking to roughly Rs 500 crore in 1998 and Rs 771 crore in 2004. That repetition reflects how the state has responded, year after year, in the same way. Assam’s default answer to flooding has been embankments, and only embankments: build them, watch them breach, rebuild them. Over the last six decades, the state has spent close to Rs 30,000 crore on this single approach. By the government’s own admission, no long-term measures to mitigate flood and erosion problems have been implemented, only immediate, short-term ones, repeated annually. The Wire has written to the Assam water resources department for its comments on how the department assesses the performance of embankments and other flood-control infrastructure during the July 2026 floods in Sivasagar and Charaideo and on the opinion of experts who argue that embankments alone cannot adequately reduce flood risk. This report will be updated if we get a response.There is a reason that cycle persists even though embankments alone were never going to be enough. Nearly a decade before this year’s floods, a 2017 CAG audit had already identified shortcomings in Assam’s flood-management programme, including inadequate hydrological investigations before projects were approved, delays in implementation, and cases where completed works failed to provide the intended level of flood protection. Flood-damaged house in Ramugaon. Photo: Dipankar Phukan.Every monsoon, donation drives reopen, officials are asked to contribute a day’s salary to the chief minister’s relief fund, and photographs of cheques being handed over circulate widely. That relief is real and needed. But it addresses the symptom, not the cause, and it can crowd out a harder conversation about why the same villages flood every year.The question that remainsThere is something worth sitting with in the department’s own history. The 1954 National Policy on Floods explicitly separated its measures into three phases: immediate, short term, and long term. Embankments were adopted as the short term measure chosen, by the government’s own account, because they could be built quickly with local resources and manpower, at comparatively low cost. Seventy years later, embankments are still effectively the primary strategy. Whatever the long term measures were meant to be, Assam’s own flood-control department has admitted no such measures have ever actually been implemented.Heavy rainfall will always be part of Assam’s flood story. But rainfall alone does not explain why the same amount of rain causes more damage now than it did twenty years ago. Siltation, deforestation, mining and a new wave of hill construction for hydropower are not acts of nature. They are the outcome of decisions, many of them made far from the villages that end up underwater, and often justified by a separate, equally real need: power, revenue, growth.None of this means those decisions were wrong on their own terms. It means they have rarely been weighed against each other in the same room. Rahman believes the problem also lies in when public attention arrives. He said, “Most of the degradation of the riverine landscape and ecosystem happens during the non-flood season. Then, when people suffer, everyone starts talking about floods. We need to keep talking about floods throughout the year, especially during the non-flood season.” Priyakshi Gogoi is an independent researcher.