The landscape had been remade by water and mud
In the final days of November 2025, two cyclones — Ditwah and Senyar — moved through South and Southeast Asia with a force that reshaped coastlines, buried villages, and claimed more than 1,200 lives across Sri Lanka, Indonesia, and Thailand. The storms remind us how swiftly nature can dissolve the boundaries between the ordinary and the catastrophic, leaving millions to navigate a world made unrecognizable by water and mud. What satellite imagery could document in pixels, no image could fully convey: the human weight of loss spread across three nations, still being counted.
- Two cyclones struck within days of each other, killing over 1,200 people and displacing millions across three countries in one of the region's deadliest storm sequences in recent memory.
- Indonesia suffered the greatest loss — 604 dead — as landslides in Sumatra buried villages and severed roads, leaving rescue teams unable to reach entire communities swallowed by mud.
- Sri Lanka's president described the country's response as the most demanding rescue operation in its history, with Colombo and Kaduwela still submerged days after the rain stopped and power knocked out across wide areas.
- In southern Thailand, rainfall so extreme meteorologists called it a once-in-three-centuries event flooded twelve provinces and affected nearly four million people around Hat Yai and Songkhla Lake.
- Satellite images revealed the true geographic scale of the disaster — cities turned to waterscapes, coastlines erased — but could not capture the race still underway to reach survivors before the absence of shelter, clean water, and medical care claims more lives.
Two cyclones swept through South and Southeast Asia last week, killing more than 1,200 people across seven days. Ditwah and Senyar brought rainfall so relentless that entire neighborhoods disappeared beneath water. Millions woke to flooded homes, severed power, and streets too dangerous to cross. Across three countries, rescuers struggled to keep pace with a disaster that kept expanding faster than their reach.
Indonesia bore the heaviest toll, with 604 deaths concentrated in Sumatra, where Cyclone Senyar triggered landslides that buried villages and made roads impassable. The city of Padang, on the island's western coast, was among the worst affected — rescue teams found the terrain itself had turned against them, with collapsed slopes and swollen rivers blocking access to entire communities.
Sri Lanka's President called the national response the most demanding rescue operation in the country's history. Three hundred and ninety people died. In Colombo and nearby Kaduwela, neighborhoods remained submerged long after the rain stopped, and widespread power outages left residents unable to refrigerate food, find light, or call for help.
Thailand's southern provinces recorded the third major blow. One hundred and seventy-six people died, with Hat Yai and the Songkhla Lake region hit by rainfall that meteorologists described as a once-in-three-centuries event. Twelve provinces were severely flooded, affecting more than 1.5 million households — nearly four million people in total.
Satellite images from Planet Labs offered the first clear view of the destruction: Colombo fragmented into islands, Padang's streets turned to rivers, Aceh's coastline blurred between sea and sky. The photographs made visible what death tolls alone could not — the vast geographic reach of two storms that struck multiple nations almost simultaneously. But what no image could show was the work still unfolding: the search for the missing, the effort to restore power, and the attempt to reach people in places where roads no longer existed.
Two cyclones swept across South and Southeast Asia last week, leaving a trail of water and wreckage that killed more than 1,100 people in seven days. The storms—Ditwah and Senyar—dumped rain so heavy that entire neighborhoods vanished underwater. Millions of people woke to find their homes flooded, their power cut, their streets impassable. Rescuers fanned out across three countries trying to reach the stranded, but the scale of the disaster kept outpacing their efforts.
Indonesia bore the heaviest toll. Six hundred and four people died there, many of them in Sumatra, where Cyclone Senyar triggered landslides that buried villages and blocked roads. The city of Padang, on the island's western coast, was among the hardest hit. Rescue teams found themselves unable to reach entire sections of the island because the terrain itself had become hostile—slopes had given way, rivers had swollen beyond their banks, and the landscape had been remade by water and mud.
Sri Lanka faced a separate storm that the country's President Anura Kumara Dissanayake called the most demanding rescue operation in the nation's history. Three hundred and ninety people died there. In the capital, Colombo, and in the nearby city of Kaduwela, whole neighborhoods remained submerged days after the rain stopped. Residents huddled in the dark—the flooding had knocked out power across wide areas, leaving people without light, refrigeration, or the ability to charge phones and call for help.
Thailand's southern provinces absorbed the third major blow. One hundred and seventy-six people died. The worst damage centered on Hat Yai and the region around Songkhla Lake, which recorded rainfall so extreme that meteorologists compared it to a storm that might occur once every three centuries. The Department of Disaster Prevention and Mitigation reported that severe flooding had touched twelve provinces, affecting more than 1.5 million households—nearly four million people in total.
Satellite images taken by Planet Labs in the days after the storms provided the first clear picture of what had happened on the ground. The photographs showed Colombo transformed into a patchwork of water and islands. They showed Padang's streets turned to rivers. They captured the coastal areas of Aceh Province in northern Sumatra, where the sea and sky seemed to have merged. The images made visible what the death tolls could only hint at: the sheer geographic reach of the disaster, the way it had touched multiple countries and millions of lives almost simultaneously.
What the satellite images could not show was the work still underway—the search for bodies, the effort to restore power, the attempt to reach people in places where roads no longer existed. Authorities across the region were racing against time and terrain, knowing that every day without shelter, clean water, or medical care increased the danger for those who had survived the initial storm. The cyclones had passed, but their aftermath was only beginning.
Notable Quotes
The most challenging rescue operation on record— Sri Lankan President Anura Kumara Dissanayake, describing the scale of the disaster in his country
The Hearth Conversation Another angle on the story
Why does the satellite imagery matter so much to this story? The death toll is already staggering.
Because numbers alone don't convey what happened. A satellite image shows you the actual footprint—how many city blocks are underwater, which neighborhoods are cut off, where the water is deepest. It turns an abstract figure into something you can see.
And that changes how people understand the scale?
It does. You read "390 dead in Sri Lanka" and your mind registers a tragedy. You see Colombo from above, entire districts as dark patches of water, and you understand that this wasn't a localized event. This was a city transformed.
The President called it the most challenging rescue operation on record. What makes this different from previous disasters there?
The combination of things. You have flooding in the capital itself, which means the infrastructure that normally responds to disasters is also damaged. You have power outages, which means rescue teams can't communicate effectively. You have neighborhoods so submerged that you can't even see where the streets are anymore.
And in Indonesia, the landslides added another layer of danger?
Exactly. Landslides don't just kill people in the moment—they block access. A rescue team trying to reach a village in Sumatra might find the only road has collapsed. That's when you need helicopters, boats, people willing to climb through unstable terrain. It stretches resources thin across an already enormous disaster.
Four million people affected in Thailand alone, and it's the least deadly of the three countries. Why the difference?
Population density, geography, building standards, warning systems—all of it matters. But also luck. The storm hit where it did. In a slightly different location, the death toll could have been much higher.