2004 INDIAN OCEAN TSUNAMI IN SRI LANKA: WAVES, DAMAGE, FEAR, ANIMALS

GREAT TSUNAMI OF DECEMBER 2004 IN SRI LANKA

Fishing boat deposited inland by the 2004 tsunami in Kallady, Batticaloa

The December 26 2004 Indian Ocean Tsunami was the worst disaster to ever occur in Sri Lanka. It killed 35,000 people and left 900,000 homeless. This is quite a lot in a nation that has only 19 million people, with the majority of them living near the coast. Nearly 40 percent of the dead were children. Only Indonesia suffered more casualties in the disaster.

Death and Damage form the 2004 Indian Ocean Tsunami Sri Lanka
Dead: 23,231; Missing: 12,091; Total: 35,322
Displaced: 516,150
Damaged or Destroyed Buildings: 119,562
Estimated Cost: US$1.5 billion
Estimated Recovery Cost: US$2.2 billion
[Source: Reuters, December 16, 2009]

Sri Lanka is located 1,600 kilometers west of the epicenter of the December 2004 earthquake. The tsunami struck Sri Lanka about two hours after the Sumatran earthquake that created it. It hit the east coast of Sri Lanka first at around 8:45am local time. It took another 30 minutes for it to whiplash around the island to the south coast, which was struck around 9:15am local time. A clock on the western side of Sri Lanka at Colombo stopped at 9:20 in the morning, so the tsunami travel time to Colombo (first wave) must have been about 2 hours and 20 minutes. The shock waves from the earthquake were enough to lift the earth four inches in Sri Lanka. The waves traveled up to 800kph in deep water and were 300 kilometers wide. The largest waves were six meters. They surged inland up to a kilometer.

The eastern shores of Sri Lanka were hit hardest hit since it faced the epicentre of the earthquake, but the southwestern shores suffered the most casualties as more people live and work there. The southwestern shores are popular with tourists and used for fishing. The degradation of the natural environment in Sri Lanka contributed to the high death tolls. The refracted tsunami waves that inundated the southwestern part of Sri Lanka lost some energy as it whiplashed around the island but also gained some energy that was reflected from impact with the Maldives.

Waves from the 2004 Tsunami in Sri Lanka

Mapping of the tsunami intensity for Sri Lanka coastal area following the December 26, 2004, Sumatra

Unlike Thailand, where the waves crashed ashore like large Hawaiian waves, the tsunami in Sri Lanka was a like surging high tide that wouldn’t stop. This was because the waters off Sri Lanka are very deep while those off Thailand are very shallow. The waves that hit Sri Lanka were widely spaced and kept coming for more than an hour. In some cases they surged far inland and then withdrew far out to sea and then surged again. In many ways the most dangerous aspect of these waves was the incoming and outgoing current that swept people away and in many cases far out to sea.

When the 2004 Indian Ocean tsunami reached Sri Lanka, the first wave often appeared as a relatively modest flood of brown-orange water moving inland. In many locations, this initial surge was followed by a dramatic withdrawal of the sea, exposing the ocean floor for distances of up to 1 kilometer (0.62 miles). Larger and far more destructive second and third waves then struck the coast. Video recordings from affected areas documented the rapid progression of the tsunami and its devastating impact on coastal communities. [Source: Wikipedia]

Footage from the city of Galle showed powerful floodwaters inundating streets, carrying debris, destroying structures, and sweeping people away. In the resort town of Beruwala, witnesses recorded a large bore-like wave advancing inland and reaching the lower floors of beachfront hotels. Other recordings from around the island showed the tsunami resembling a fast-moving flood that surged across low-lying coastal areas. In some locations, seawalls and breakwaters helped reduce the force of the incoming waves, limiting damage behind these protective structures.

Field surveys conducted after the disaster recorded some of the highest tsunami run-up heights in Sri Lanka at Yala on the southeastern coast. There, the maximum run-up reached 12.5 meters (41 feet), with inundation extending between 390 and 1,500 meters (1,280 and 4,920 feet) inland. In Hambantota, run-up heights reached 11 meters (36 feet), while tsunami waters penetrated as far as 2 kilometers (1.2 miles) inland in some areas. These measurements illustrate the exceptional energy of the tsunami and its ability to affect locations well beyond the immediate shoreline.

Tsunami heights varied significantly around Sri Lanka’s coastline depending on local geography and coastal orientation. Along much of the coast, measured run-up heights ranged from approximately 2.4 to 4.1 meters (7.9 to 13.5 feet). On the eastern coast, wave heights ranged from 4.5 to 9 meters (15 to 30 feet), particularly between Pottuvil and Batticaloa. In the northeastern region around Trincomalee, waves generally measured between 2.6 and 5 meters (8.5 and 16.5 feet), while along the southwestern coast from Moratuwa to Ambalangoda, heights were typically between 4 and 5 meters (13 to 16 feet). These variations reflected differences in coastal topography, seafloor conditions, and exposure to the incoming tsunami waves.

Tsunami strikes Sri Lanka, top; normal day, bottom, NASA

Maximum Tsunami Wave Heights in Different Places in Sri Lanka

Koggala: 9 meters (30 feet)
Galle port: 6 meters (20 feet)
Galle coast: 4.8 meters (16 feet)
Nonagama: 8.7 meters (29 feet)
Weligama: 4.9 meters (16 feet)
Dodanduwa: 4 meters (13 feet)
Ambalangoda: 4.7 meters (15 feet)
Hikkaduwa Fishery Harbour: 4.7 meters (15 feet)
Kahawa: 10 meters (33 feet)
North Beach of Beruwala: 4.8 meters (16 feet)
Paiyagala: 6 meters (20 feet) [Source: Wikipedia]

Areas Devastated by the Great Tsunami of 2004 in Sri Lanka

The December 2004 tsunami struck the east coast of Sri Lanka the hardest and the southern coast pretty hard too. The west coast, including Colombo, was either spared or received damage that was minimal compared to the eastern and southern coasts. Death tolls in the south were high because population densities are high there. Fortunately the east coast is not that heavily populated or even more people would have died.

The area around Kalmunai, on the east coast of Sri Lanka about 50 kilometers south of Batticaloa, was the worst hit area in Sri Lanka. Around 10,000 people were killed along a single 6.4 kilometer section of beach, with entire villages disappearing with hardly a trace left behind. One local official interviewed by the New York Times said he lost 27 relatives, counted 374 dead around his home, and oversaw the burial of 2,250 people. Most of the victims were Tamils and Muslims crushed and washed away by a huge wave that sounded like a bomb exploding when it struck.

At Trincomalee in the northeast, the tsunami reached more than 2 kilometers (1.25 mi) inland killing about 800 people. In the neighboring Amparai district alone, more than 5,000 people died. The naval base at Trincomalee was reported to be submerged. Around 3,000 people were killed around Mullaittavu and Vadamaradchi East in northeast Sri Lanka and the fishing villages around them. Entire extended families were wiped out. People were pushed hundreds of meters inland and then pulled out to sea. The beach road and many of the houses that were on it vanished. [Source: Dr. George Pararas-Carayannis, 2007]

More than 4,000 died in the southern historical, resort town of Galle. Many died where water was funneled trough a busy bus and train station. A train packed with commuters overturned. In some marshy areas people literally walked on corpses Not far away in Hambantota 4,500 people died. More than 2,500 bodies were fished from the lagoon near the town.

Damage from the December 2004 Tsunami in Sri Lanka

Tsunami debris far inland in Sri Lanka,

Losses were great in terms of destroyed or damaged roads, boats, ports, hotels, clinics, houses and other buildings. More than 130,000 homes were destroyed. The damage was often hit and miss. Some places that were devastated were right next to places that seemed untouched. A total of 438 of the 450 fishing vessels in the town of Arugam Bay were put out of operation by the tsunami. By April only 15 percent of the fleet had been restored. Unlike Aceh in Indonesia. most of the roads remained useable, which made it possible to deliver relief supplies.

Describing the scene in Dewata, a small town near Galle, Mark Magnier wrote in the Los Angeles Times, “An few concrete buildings are still standing along he road, but their contents have been disgorged...Most of the area is a tangle of smashed beams, twisted coconut tree limbs and bricks. some covered with bits of blue and white plaster, the remnants of walls...In trees that withstood the force of the waves, nests of torn fishing nets, broken planks and colored plastic bags are caught in the branches...Further inland are houses that were shattered as the water surged, twisting and tearing everything in it path. Scattered here and there are remnants of lives that so recently filled these ruined buildings: a single gold sandal, a toothbrush, a torn purple sari that retain a certain grace in its resting place in the dirt. Cats, their owners displaced or dead, slink over the uneven terrain, looking confused and skittish.”

About a month after the tsunami struck, Jeff Greenwald wrote in Salon.com: Our drive up the coast toward Batticaloa is interrupted by numerous detours and backtracks. We'll pass through a town and travel five rough miles up the half-collapsed road, only to find the bridge down. Illustrated with fierce clarity is the sheer breadth of the killer wave. The entire coastline of Sri Lanka is a wreck. Sometimes the damage lies right at the shore, sometimes it extends far inland, but it is nearly universal. Many houses of worship — Buddhist, Hindu, Christian and Muslim — were spared but not all. Just north of Thirrukovil we find a Hindu temple hit by the tsunami. Colorful statues and bits of paintings lay scattered across the roadside like an exploded bouquet. [Source: Jeff Greenwald, Salon.com, January 20, 2005,

Victims of the 2004 Tsunami in Sri Lanka

Many of the dead were women, children and the elderly. Many were in the eastern district of Batticaloa. Along the beaches many dead children were tangled in wire mesh used to protect seaside homes from erosion. Corpses were wrapped in sarongs and placed near the sides of the roads. In some cases their burials were carried out with forks and spoons. Most of the victims had been found and buried by mid-January. Few bodies were discovered after that.

Many of the victims were Tamils. Several thousand Tamils died in territory controlled by the Tamil Tigers separatist group. Sri Lanka was in the middle of the tourist season. Hotels were filled with foreigners. Still foreigner made up only 0.5 percent of dead (160, the figure was much higher in Thailand) because the worst hit areas where along the east coast, which does not receive many tourists.

Many places were struck more than two hours after the earthquake that generated the tsunami. If an adequate warning system had been in place nearly all the 32,000 people that were killed would have survived. The national meteorology department in Colombo makes decisions about warnings. Officials there usually make weather warning and don’t even have seismographs. Officials were looking at the US Geological Survey website and debating whether or not to issue a warning when the first waves of the tsunami hit eastern Sri Lanka.

Environmental Damage from the 2004 Tsunami in Sri Lanka

In Sri Lanka, studies have revealed damage to the coast and coral reefs. Trees were uprooted along the coast and some lush green areas were turned into bogs or moonscapes. Water bodies and wells along parts of the Sri Lankan coast became also polluted either by sewage or salt water, or both, while disposing of all the debris from towns and villages flattened by the waves was a huge task. [Source: Dean Yates, Reuters, June 19 2005]

A U.N. Environment Program impact study said over 1.1 billion pounds of rubble was generated by the devastating waves and 15,000 wells were rendered unusable. Coastlines that had healthy coral reefs and mangroves suffered less damage than other nearby devastated areas, the study showed. Reefs acted as buffers to the waves and the mangroves absorbed the force of the tsunami.

Coral reefs around the coast of Sri Lanka suffered much less damage from the Indian Ocean tsunami than was initially feared, surveys by divers indicated. Marine life and fish populations — appear to have been little affected by the tsunami. [Source: BBC]

The hatcheries of the Bentota Sea Turtles Project.were destroyed. The waves killed thousands of baby turtles that were set been released into the sea the very day the tsunami struck. "It was more than 20,000 turtle hatchlings ready to go," said Kithsiri Kannangara, who set up the project in the late 1970s. Of those, only 400 were saved. "The tsunami did a lot of problems for endangered species to protect ... to survive," he told CNN Of his three green turtles, two were rescued. Of his Oliver Ridley species, only one of three. Of the hawksbill, he lost nine of 11. His single loggerhead turtle was found, but its shell was badly damaged. [Source: Hugh Riminton, CNN, January 7, 2005]

How Development Made the Tsunami in Sri Lanka Worse

Studies conducted after the 2004 Indian Ocean tsunami suggested that human alteration of coastal environments may have increased the severity of damage in some affected areas. Researchers examining the disaster in Sri Lanka found evidence that activities such as coral mining, dune removal, and coastal development had weakened natural barriers that would otherwise have helped reduce the force of the tsunami. Their findings highlighted the important role that healthy coastal ecosystems can play in protecting communities from extreme natural hazards. [Source: Reuters, June 9, 2005]

In Sri Lanka, researchers documented tsunami flooding of up to 10 meters (30–35 feet) along parts of the eastern coast, which faced the incoming waves directly. While the western coast was affected less severely overall because it was struck by waves that had wrapped around the island, some locations still experienced unexpectedly high levels of destruction. Investigators concluded that differences in local coastal conditions, including the degree of human modification, helped explain variations in tsunami impacts.

One of the clearest examples involved areas where coral reefs had been heavily mined for construction materials or damaged by tourism-related activities. Researchers noted that extensive coral extraction had occurred near the site where the Samudra Devi passenger train was derailed and overturned by the tsunami, killing more than 1,000 people. In this area, tsunami waters reached depths of approximately 7.6 meters (25 feet). The loss of coral reefs may have reduced the natural protection that these offshore structures normally provide by absorbing wave energy before it reaches the shoreline.

The researchers also documented cases where coastal sand dunes had been altered to improve ocean views for resorts and other developments. In one instance near Yala, a resort had removed part of a seaward-facing dune, creating a low-lying gap between the ocean and the hotel. The tsunami exploited this opening, channeling water inland and destroying the resort. Nearby areas where dunes remained intact experienced less severe damage. According to the researchers, the removal of natural coastal defenses created pathways through which tsunami energy could travel more freely, increasing destruction in localized areas.

The findings underscored the importance of preserving natural coastal barriers such as coral reefs, dunes, mangrove forests, and beaches. Scientists argued that these features act as buffers against storm surges, erosion, and tsunamis, helping to reduce the impact of large waves on coastal communities. They urged governments to enforce environmental regulations more strictly and to consider tsunami risk when approving coastal development projects.

Rumors and Fear After the 2004 Tsunami in Sri Lanka

Reporting from the Galle area about a week after the tsunami, Robert Marquand wrote in , Christian Science Monitor, “Despite what officials are describing as a new "postemergency phase" of the tsunami, locals here say the central issue is still a paralyzing mentality of fear. On the street, rumors of another tsunami are rife, and there is little official information broadcast to counter it. Speculation swirls about outbreaks of disease, and mixes with newly confirmed reports of scattered riots and banditry. There is no community spirit yet of picking up the pieces and getting on with life. Instead, some 1.5 million displaced persons are heading inland in a coastal exodus that is creating new logistical problems. [Source:Robert Marquand, Christian Science Monitor, January 3, 2005]

"If you talk about the real crisis now, it is the rumors and fears running in the people's minds," says Atula Hewawitharana, the harbor master in Galle. "People are still scared, and will not show up to help." Three days ago a radio station in Tamil Nadu, India, broadcast a report that an aftershock had created another tsunami. Some 200 villagers employed by Mr. Hewawitharana, who were helping with salvage operations, ran away and did not come back. On Saturday, a similar rumor caused a panic for several hours on the east coast.

Fish is a staple for most Sri Lankans, but seafood prices plunged as many people feared that the fish had fed on human flesh and would be contaminated. But health officials said that was untrue. "Scientifically, there's nothing to prove that fish caught after the tsunami cannot be consumed," Health Minister Nimal Siripala de Silva told The Associated Press. "It's only a psychological myth that I'm sure will pass with time."

Galle's local health ministry chief, Plyasena Samarakoon, says, "We need people to go home. That is a prerequisite for any return to normalcy. A lot of people still have livable houses or relatives they can stay with. But people aren't ready for that. They are staying away."

Animals in Sri Lanka Seemed to Sense the 2004 Tsunami Was Coming

Amazingly there were hardly any dead wild animals, even at Yala national park, where waves crept inland more than three kilometers. H.D. Ratnayake, deputy director of the national Wildlife Department, told Reuters: “The strange thing is we haven’t recorded any dead animals. No elephants are dead, not even a dead hare or rabbit. I think animals can sense disaster. They have a sixth sense. They know when things are happening.” A naturalist at the Yala Safari Game Lodge told Travel & Leisure magazine that birds acted strangely and sang strange songs, then the sea retreated, followed by a huge, surging five-meter wave that inundated the resort and carried away at least 42 guests and 13 employees.

Yala National Park is Sri Lanka's biggest wildlife reserve and home to hundreds of wild elephants and several leopards. At least 40 tourists, including nine Japanese, were drowned in the park. The "Yala Safari" tourist hotel close to the main gate of Yala National Park was completely destroyed. Partanangala lodging and Patanamgala tourist at the center of the park were badly damaged. At the time of the tsunami about 250 foreign and local tourists were occupying the hotels. Wildlife Officers said that there were nearly 100 foreign and local tourists and fishermen at Patanangala sea coast at the time tsunami hit. [Source: Reuters December 29, 2004; Duminda Sanjeewa Balasuriya, DailyMirror, December , 2004

Eyewitnesses in Sri Lanka reported that elephants moved inland toward higher ground, dogs refused to leave their homes, flamingos abandoned low-lying nesting areas, and some zoo animals sought shelter before the arrival of the tsunami. These observations attracted widespread attention because relatively few animal deaths were reported compared to the enormous human toll caused by the disaster. [Source: Maryann Mott, National Geographic, January 4, 2005]

In some wildlife areas affected by the tsunami, observers reported finding surprisingly few animal carcasses. This led to renewed interest in the long-standing belief that animals may be capable of detecting environmental changes that precede natural disasters. . According to Ravi Corea, president of the Sri Lanka Wildlife Conservation Society, Yala park personnel reported seeing elephants moving away from the coast before the tsunami arrived. After the disaster, Corea visited heavily damaged areas of the park and reported seeing very few dead animals. Similar reports came from India, where some observers noted that buffaloes, goats, and dogs appeared to have survived in areas where many people were killed.

Researchers have suggested several possible explanations for such behavior. Many animals possess senses that are more sensitive than those of humans and may be able to detect subtle environmental changes. Scientists have proposed that animals could respond to low-frequency vibrations, seismic waves, changes in air pressure, or other signals generated by large earthquakes and approaching tsunamis. However, while numerous anecdotal reports exist, researchers have found it difficult to gather systematic scientific evidence proving that animals can reliably predict natural disasters.

Image Sources: Wikimedia Commons

Text Sources: National Geographic, New York Times, Washington Post, Los Angeles Times, Smithsonian magazine, Encyclopedia.com, Library of Congress, Live Science, The Conversation, The New Yorker, Time, BBC, CNN, Reuters, Associated Press, AFP, Lonely Planet Guides, Google AI, Wikipedia, The Guardian and various websites, books and other publications.

Last updated June 2026