The
1991 Bangladesh cyclone (IMD designation:
BOB 01, JTWC designation:
02B) was among the
deadliest tropical cyclones on record. On the night of 29 April 1991 a powerful
tropical cycloneA tropical cyclone is a storm system characterized by a large low-pressure center and numerous thunderstorms that produce strong winds and heavy rain. Tropical cyclones strengthen when water evaporated from the ocean is released as the saturated air rises, resulting in condensation of water vapor...
struck the
ChittagongChittagong ) is a city in southeastern Bangladesh and the capital of an eponymous district and division. Built on the banks of the Karnaphuli River, the city is home to Bangladesh's busiest seaport and has a population of over 4.5 million, making it the second largest city in the country.A trading...
district of southeastern
BangladeshBangladesh , officially the People's Republic of Bangladesh is a sovereign state located in South Asia. It is bordered by India on all sides except for a small border with Burma to the far southeast and by the Bay of Bengal to the south...
with winds of around 250 km/h (155 mph). The storm forced a 6 metre (20 ft) storm surge inland over a wide area, killing at least 138,000 people and leaving as many as 10 million homeless.
Meteorological history
An area of persistent cloudiness, in part due to the monsoon trough, developed into a tropical depression on April 22 in the
Bay of BengalThe Bay of Bengal , the largest bay in the world, forms the northeastern part of the Indian Ocean. It resembles a triangle in shape, and is bordered mostly by the Eastern Coast of India, southern coast of Bangladesh and Sri Lanka to the west and Burma and the Andaman and Nicobar Islands to the...
. The wind speed and overall size increased, with the depression becoming Tropical Storm 02B on the 24th. The enormous wind field at the time encompassed nearly the entire bay.
The tropical storm continued slowly northwestward, slowly strengthening to a cyclone-strength storm on the 27th. The cyclone moved between a high pressure system to its northwest and east, and as mid-level westerlies met up with the storm, the cyclone moved northeastward. The westerlies enhanced upper level outflow, and in combination with warm water temperatures the cyclone steadily strengthened to a major hurricane on the 28th.
On the 28th and 29th, as the system increased its speed to the north-northeast, the cyclone rapidly intensified to a 160 mph Cyclone, the equivalent to a Category 5 hurricane. Late on the 29th, Cyclone 02B made landfall a short distance south of
ChittagongChittagong ) is a city in southeastern Bangladesh and the capital of an eponymous district and division. Built on the banks of the Karnaphuli River, the city is home to Bangladesh's busiest seaport and has a population of over 4.5 million, making it the second largest city in the country.A trading...
as a slightly weaker 155 mph Category 4 Cyclone. The storm rapidly weakened over land, and dissipated on the 30th over
southeast AsiaSoutheast Asia, South-East Asia, South East Asia or Southeastern Asia is a subregion of Asia, consisting of the countries that are geographically south of China, east of India, west of New Guinea and north of Australia. The region lies on the intersection of geological plates, with heavy seismic...
.
Fatalities
At least 138,000 people were killed by the storm, with the majority of deaths in the
ChittagongChittagong ) is a city in southeastern Bangladesh and the capital of an eponymous district and division. Built on the banks of the Karnaphuli River, the city is home to Bangladesh's busiest seaport and has a population of over 4.5 million, making it the second largest city in the country.A trading...
area. Most deaths were from drowning, with the highest mortality among children and the elderly. Although cyclone shelters had been built after the
1970 Bhola cycloneThe 1970 Bhola cyclone was a devastating tropical cyclone that struck East Pakistan and India's West Bengal on November 12, 1970. It was the deadliest tropical cyclone ever recorded, and one of the deadliest natural disasters in modern times...
, many had just a few hours of warning and did not know where to go for shelter. Others who knew about the storm refused to evacuate because they did not believe the storm would be as bad as forecast. Even so it is estimated over 2 million people did evacuate from the most dangerous areas, possibly mitigating the disaster substantially.
Property damage
The storm caused an estimated $1.5 billion (1991 US dollars) in damage. The high velocity wind and the
storm surgeA storm surge is an offshore rise of water associated with a low pressure weather system, typically tropical cyclones and strong extratropical cyclones. Storm surges are caused primarily by high winds pushing on the ocean's surface. The wind causes the water to pile up higher than the ordinary sea...
devastated the coastline. Although a concrete levee was in place near the mouth of the
Karnaphuli RiverKarnaphuli is a wide river in the south-eastern part of Bangladesh. Originating from the Lushai hills in Mizoram, India, it flows southwest through Chittagong Hill Tracts and Chittagong into the Bay of Bengal. A large hydroelectric power plant using Karnaphuli river was built in the Kaptai...
in
PatengaPatenga is a sea beach located 14 kilometres south of the port city of Chittagong, Bangladesh. It is near the mouth of the Karnaphuli River....
, it was washed away by the storm surge. The cyclone uprooted a 100-ton crane from the
Port of ChittagongThe Port of Chittagong is the largest seaport in Bangladesh, located by the estuary of the Karnaphuli River in Patenga, near the city of Chittagong. It is a deepwater seaport dominated by trade in containerised manufactured products , raw materials and to a lesser extent passengers...
, and smashed it on the Karnaphuli River Bridge, effectively breaking it into two partitions. A large number of boats and smaller ships ran aground.
Bangladesh NavyThe Bangladesh Navy is the naval arm of the Bangladesh Armed Forces. At present the navy is mostly limited to coastal patrolling, however it is implementing an ambitious procurement and expansion program to ensure the security of Bangladesh's maritime boundary...
and
Bangladesh Air ForceThe Bangladesh Air Force , is the air arm of the Bangladesh Armed Forces. Bangladesh Air Force currently employs more than 22,000 personnel including 600+ Pilots.-History:...
, both of which had bases in
ChittagongChittagong ) is a city in southeastern Bangladesh and the capital of an eponymous district and division. Built on the banks of the Karnaphuli River, the city is home to Bangladesh's busiest seaport and has a population of over 4.5 million, making it the second largest city in the country.A trading...
, were also heavily hit. The Isha Khan Naval Base at Patenga was flooded, with heavy damages to the ships. Most of the fighter planes belonging to the air force were damaged. Approximately 1 million homes were destroyed, leaving about 10 million people (a substantial portion of Bangladesh's population) homeless.
Environmental impact
The storm surge subsequently caused the embankment, as well as whole villages, to be swept away. For an additional three to four weeks after the storm had dissipated, mass land erosion resulted in more and more farmers losing their land, and therefore, the number of unemployed rose.
International response
The
United StatesThe United States of America is a federal constitutional republic comprising fifty states and a federal district...
amphibious task-force, consisting of 15 ships and 2,500 men, returning to the US after the
Gulf WarThe Persian Gulf War , commonly referred to as simply the Gulf War, was a war waged by a U.N.-authorized coalition force from 34 nations led by the United States, against Iraq in response to Iraq's invasion and annexation of Kuwait.The war is also known under other names, such as the First Gulf...
was diverted to the Bay of Bengal. This was part of Operation Sea Angel, one of the largest military disaster relief efforts ever carried out, with the
United KingdomThe United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...
,
ChinaChina , officially the People's Republic of China , is the most populous country in the world, with over 1.3 billion citizens. Located in East Asia, the country covers approximately 9.6 million square kilometres...
,
IndiaIndia , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...
,
PakistanPakistan , officially the Islamic Republic of Pakistan is a sovereign state in South Asia. It has a coastline along the Arabian Sea and the Gulf of Oman in the south and is bordered by Afghanistan and Iran in the west, India in the east and China in the far northeast. In the north, Tajikistan...
and
JapanJapan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...
also participating.
http://www.globalsecurity.org/military/ops/sea_angel.htm
Operation Sea Angel began on May 10, 1991 when President Bush directed the US military to provide humanitarian assistance. A Contingency Joint Task Force under the command of Lieutenant General Henry C. Stackpole, consisting of over 7,000 US soldiers, was subsequently sent to Bangladesh to provide food, water, and medical care to nearly two million people. The efforts of U.S. troops, which included 3,000 tons of supplies, are credited with having saved as many as 200,000 lives.
See also
- 1970 Bhola cyclone
The 1970 Bhola cyclone was a devastating tropical cyclone that struck East Pakistan and India's West Bengal on November 12, 1970. It was the deadliest tropical cyclone ever recorded, and one of the deadliest natural disasters in modern times...
- 2004 Indian Ocean earthquake
The 2004 Indian Ocean earthquake was an undersea megathrust earthquake that occurred at 00:58:53 UTC on Sunday, December 26, 2004, with an epicentre off the west coast of Sumatra, Indonesia. The quake itself is known by the scientific community as the Sumatra-Andaman earthquake...
- Cyclone Nargis
Cyclone Nargis , was a strong tropical cyclone that caused the worst natural disaster in the recorded history of Burma. The cyclone made landfall in Burma on Friday, May 2, 2008, causing catastrophic destruction and at least 138,000 fatalities...
- List of tropical cyclones
External links