1970 Bhola cyclone

Tropical cyclone that struck East Pakistan in 1970

1970 Bhola cyclone
The ITOS 1 weather satellite image of the cyclone shortly after peak intensity making landfall in East Pakistan on November 12
Meteorological history
FormedNovember 8, 1970
DissipatedNovember 13, 1970
Extremely severe cyclonic storm
3-minute sustained (IMD)
Highest winds185 km/h (115 mph)
Lowest pressure960 hPa (mbar); 28.35 inHg
Category 4-equivalent tropical cyclone
1-minute sustained (SSHWS/JTWC)
Highest winds240 km/h (150 mph)
Overall effects
Fatalities300,000–500,000
(Deadliest tropical cyclone on record)
Damage$86.4 million (1970 USD)
Areas affectedEast Pakistan (present-day Bangladesh) and India

Part of the 1970 North Indian Ocean cyclone season

The 1970 Bhola cyclone (also known as the Great Cyclone of 1970[1]) was a devastating tropical cyclone that struck East Pakistan (present-day Bangladesh) and India's West Bengal on November 12, 1970.[2] It remains the deadliest tropical cyclone ever recorded and one of the world's deadliest humanitarian disasters. At least 300,000 people died in the storm,[3] possibly as many as 500,000,[4][5] primarily as a result of the storm surge that flooded much of the low-lying islands of the Ganges Delta.[6] Bhola was the sixth and strongest cyclonic storm of the 1970 North Indian Ocean cyclone season.[7]

The cyclone formed over the central Bay of Bengal on November 8 and traveled northward, intensifying as it did so. It reached its peak with winds of 185 km/h (115 mph) on November 10, and made landfall on the coast of East Pakistan on the following afternoon. The storm surge devastated many of the offshore islands, wiping out villages and destroying crops throughout the region. In the most severely affected upazila, Tazumuddin, over 45% of the population of 167,000 were killed by the storm.

The Pakistani government, led by junta leader General Yahya Khan, was criticized for its delayed handling of relief operations following the storm, both by local political leaders in East Pakistan and by the international media. During the election that took place a month later, the opposition Awami League gained a landslide victory in the province, and continuing unrest between East Pakistan and the central government triggered the Bangladesh Liberation War, which led to the 1971 Bangladesh genocide and eventually concluded with the creation of the independent People's Republic of Bangladesh.

Meteorological history

Map plotting the storm's track and intensity, according to the Saffir–Simpson scale
  Tropical depression (≤38 mph, ≤62 km/h)
  Tropical storm (39–73 mph, 63–118 km/h)
  Category 1 (74–95 mph, 119–153 km/h)
  Category 2 (96–110 mph, 154–177 km/h)
  Category 3 (111–129 mph, 178–208 km/h)
  Category 4 (130–156 mph, 209–251 km/h)
  Category 5 (≥157 mph, ≥252 km/h)
  Unknown
Storm type
circle Tropical cyclone
square Subtropical cyclone
triangle Extratropical cyclone, remnant low, tropical disturbance, or monsoon depression