The 1970 Bhola cyclone was a devastating tropical cyclone that struck East Pakistan and India's West Bengal on 12 November 1970. 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, possibly as many as 500,000, primarily as a result of the storm surge that flooded much of the low-lying islands of the Ganges Delta. Bhola was the sixth and strongest cyclonic storm of the 1970 North Indian Ocean cyclone season.
Kakinada is a port city and municipal corporation in the Indian state of Andhra Pradesh. Situated along the Bay of Bengal, it serves as the headquarters of Kakinada district and is a significant economic and cultural centre in the region. It is the sixth most populous city in the state and is recognised as one of the most liveable and cleanest cities in India among those with a population under one million. Nicknamed the "Pensioners' Paradise," Kakinada is known for its well-planned layout and modern infrastructure.
The 1991 Bangladesh cyclone was among the deadliest tropical cyclones in recorded history. It was also one of the most powerful cyclones in the Indian Ocean. Forming out of a large area of convection over the Bay of Bengal on April 24, the tropical cyclone initially developed gradually while meandering over the southern Bay of Bengal. On April 28, the storm began to accelerate northeastwards under the influence of the southwesterlies, and rapidly intensified to super cyclonic storm strength near the coast of Bangladesh on April 29. After making landfall in the Chittagong district of southeastern Bangladesh with winds of around 250 km/h (155 mph), the cyclone rapidly weakened as it moved through northeastern India, degenerating into a remnant low over the Yunnan province in western China.
The 1999 Odisha cyclone was the most intense recorded tropical cyclone in the North Indian Ocean and among the most destructive in the region. The 1999 Odisha cyclone organized into a tropical depression in the Andaman Sea on 25 October, though its origins could be traced back to an area of convection in the Sulu Sea four days prior. The disturbance gradually strengthened as it took a west-northwesterly path, reaching cyclonic storm strength the next day. Aided by highly favorable conditions, the storm rapidly intensified, attaining super cyclonic storm intensity on 28 October, before peaking on the next day with winds of 260 km/h (160 mph) and a record-low pressure of 912 mbar. The storm maintained this intensity as it made landfall on Odisha on 29 October. The cyclone steadily weakened due to persistent land interaction and dry air, remaining quasi-stationary for two days before slowly drifting offshore as a much weaker system; the storm dissipated on 4 November over the Bay of Bengal.
The years before 1890 featured the pre-1890 North Indian Ocean cyclone seasons. Each season was an event in the annual cycle of tropical cyclone formation. The North Indian tropical cyclone season has no bounds, but they tend to form between April and December, peaks in May and November. These dates conventionally delimit the period of each year when most tropical cyclones form in the northern Indian Ocean. Below are the most significant cyclones in the time period. Because much of the North Indian coastline is near sea level and prone to flooding, these cyclones can easily kill many with storm surge and flooding. These cyclones are among the deadliest on earth in terms of numbers killed.
Coringa, also known as Korangi, is a coastal village in Kakinada district, Andhra Pradesh, India. It consists of the village and the adjacent Hope Island, which was named by British officials in the hope that it would be protected from environmental disasters.
The 1970 North Indian Ocean cyclone season had no bounds, but tropical cyclones in the North Indian Ocean tend to form between April and December, with peaks in May and November. The 1970 season saw a total of seven cyclonic storms, of which three developed into severe cyclonic storms. The Bay of Bengal was more active than the Arabian Sea during 1970, with all of the three severe cyclonic storms in the season forming there. Unusually, none of the storms in the Arabian Sea made landfall this year. The most significant storm of the season was the Bhola cyclone, which formed in the Bay of Bengal and hit Bangladesh on November 12. The storm killed at least 500,000, making it the deadliest tropical cyclone in recorded history. The season was also the deadliest tropical cyclone season globally, with 500,805 fatalities, mostly due to the aforementioned Bhola cyclone.
The 2008 North Indian cyclone season was one of the most disastrous tropical cyclone seasons in modern history, causing more than 140,000 fatalities and over US$15 billion in damage. At the time, it was the costliest season in the North Indian Ocean, until it was surpassed by 2020. The season has no official bounds but cyclones tend to form between April and December. These dates conventionally delimit the period of each year when most tropical cyclones form in the northern Indian Ocean. There are two main seas in the North Indian Ocean—the Bay of Bengal, which is east of India, and the Arabian Sea, which is west of India. The official Regional Specialized Meteorological Centre in this basin is the India Meteorological Department (IMD), however the Joint Typhoon Warning Center releases unofficial advisories for military interests. An average of four to six storms form in the North Indian Ocean every season. Cyclones occurring between the meridians 45°E and 100°E are included in the season by the IMD.
Hope Island(Krachchu Lanka)is a small tadpole shaped Island situated off the coast of Kakinada, India, in the Bay of Bengal.
The 1989 North Indian Ocean cyclone season was a below-average season in annual cycle of tropical cyclone formation. Despite this, the season had the second highest Accumulated Cyclone Energy in the basin on record behind only 2019 and 2023. The season has no official bounds but cyclones tend to form between April and December. These dates conventionally delimit the period of each year when most tropical cyclones form in the northern Indian Ocean. There are two main seas in the North Indian Ocean—the Bay of Bengal to the east of the Indian subcontinent and the Arabian Sea to the west of India. The official Regional Specialized Meteorological Centre in this basin is the India Meteorological Department (IMD), while the Joint Typhoon Warning Center (JTWC) releases unofficial advisories. An average of five tropical cyclones form in the North Indian Ocean every season with peaks in May and November. Cyclones occurring between the meridians 45°E and 100°E are included in the season by the IMD.
The 1991 North Indian Ocean Cyclone season was an extremely deadly and destructive season causing the deaths of more than 138,000 people and over $1.5 billion in damages. It was the period in which tropical cyclones formed to the north of the equator in the Indian Ocean. During the season tropical cyclones were monitored by the India Meteorological Department (IMD) and the Joint Typhoon Warning Center. The IMD assigned all depressions that it monitored with BOB followed by a number in numerical order. The JTWC also assigned a number and either the letter A or B depending on where the depression was when the first advisory was issued.
India is a country in the north of Indian Ocean that is the most vulnerable to getting hit by tropical cyclones in the basin, from the east or from the west. On average, 2–3 tropical cyclones make landfall in India each year, with about one being a severe tropical cyclone or greater.
Cyclonic Storm Nilam was the deadliest tropical cyclone to directly affect South India since Cyclone Jal in 2010. Originating from an area of low pressure over the Bay of Bengal on October 28, 2012, the system began as a weak depression 550 km (340 mi) northeast of Trincomalee, Sri Lanka. Over the following few days, the depression gradually intensified into a deep depression, and subsequently a cyclonic storm by October 30. It made landfall near Mahabalipuram on October 31 as a strong cyclonic storm with peak winds of 85 km/h (55 mph). In Chennai's Marina Beach, strong winds pushed piles of sand ashore and seawater reached nearly a 100 m (330 ft) inland. Schools and colleges in the city remained closed for more than three days.
The 1960 North Indian Ocean cyclone season featured two deadly tropical cyclones that collectively killed approximately 20,000 people collectively in East Pakistan. The Indian subcontinent divides the North Indian Ocean into two areas: the Bay of Bengal to the east and the Arabian Sea to the west. The official Regional Specialized Meteorological Centre for this basin is the India Meteorological Department (IMD), while the Joint Typhoon Warning Center releases unofficial advisories. On average, five storms form in the North Indian Ocean every season with dual peaks in activity during May and November. Cyclones that occurred between 45°E and 100°E were included in seasonal records by the IMD.
The 1996 Andhra Pradesh cyclone was a small but powerful storm that left heavy damage in the Indian state of Andhra Pradesh. It formed on 4 November in the eastern Bay of Bengal. Moving westward, it quickly organized and developed a well-defined eye. On 6 November, the cyclone struck about 50 km (31 mi) south of Kakinada, Andhra Pradesh at peak intensity. The India Meteorological Department estimated peak winds of 145 km/h (90 mph), while the American-based Joint Typhoon Warning Center (JTWC) assessed peak winds of 215 km/h (135 mph). Soon after landfall, the cyclone weakened and dissipated by 7 November.
The 1995 India cyclone was a tropical cyclone that struck southeastern India which later spawned a rare snowstorm in Nepal, triggering the deadliest mountain trekking incident in the country's history in November 1995. The storm originated from the monsoon trough on November 7 in the Bay of Bengal, east of India, becoming the penultimate storm of the 1995 North Indian Ocean cyclone season. Moving northwestward, the system gradually intensified while moving toward land, eventually developing an eye in the middle of the convection. Reaching peak winds of at least 120 km/h (75 mph), the India Meteorological Department (IMD) classified the system as a very severe cyclonic storm on November 8, in line with intensity estimates from the American-based Joint Typhoon Warning Center (JTWC). On November 9, the cyclone made landfall near the border of Andhra Pradesh and Orissa. A typical for most November storms, the system continued to the north and dissipated over Nepal on November 11.
Super Cyclonic Storm Amphan was an extremely powerful and catastrophic tropical cyclone that caused widespread damage in Eastern India, specifically in West Bengal and Odisha, and in Bangladesh, in May 2020. It was the strongest tropical cyclone to strike the Ganges Delta. It was a rare cyclone that lashed northern Bangladesh from Rajshahi to Rangpur in the early hours of 21 May with strong winds. It caused severe damage to mango production of Rajshahi and Rangpur. It was also the fourth super cyclone that hit West Bengal and Kolkata since 2015 as well as being one of the strongest storms to impact the area. Causing over US$13 billion of damage, Amphan is also the costliest cyclone ever recorded in the North Indian Ocean, surpassing the record held by Cyclone Nargis of 2008.
On 5 October 1864, most of the areas of Calcutta, India was inundated and destroyed by a tropical cyclone. Dubbed the 1864 Calcutta cyclone, the storm caused over 60,000 fatalities in its wake. The cyclone crossed the coast of West Bengal to the south of Hooghly River, one of the streams that are included in the Ganges River Delta. The majority of the deaths were from drowning and the others from sicknesses prevailing before the storm. The said river overflowed due to a storm surge and as the water rushed inland, everything in its course were washed away. The city, the other surrounding areas, and some harbors had to be rebuilt after the cyclone. There was also fundraising event established, but it failed. The total damages from the said storm were at Rs 99,200.
The 1737 Calcutta cyclone, also known as the Hooghly River cyclone of 1737 or the Great Bengal cyclone of 1737, was the first super cyclone on record in North Indian Ocean and is regarded as one of the worst natural disasters in India. It hit the coast near Kolkata on the morning of 11 October 1737 and has been reported to have killed over 300,000 people inland and at sea, and caused widespread catastrophic damage. The cyclone hit land over the Ganges River Delta, just southwest of Calcutta. Most deaths resulted from the storm surge and happened on the sea: many ships sank in the Bay of Bengal and an unknown number of livestock and wild animals were killed from the effects of the cyclone. The damage was described as "extensive" but numerical statistics are unknown.
