Cyclone Sidr, which roared ashore with winds of more than 200 kilometres per hour, has killed at least 214 people in Bangladesh, an official with the disaster management office in Dhaka said Friday.

Muhammad Mia said 87 deaths were reported alone in the coastal district of Barguna, the area hardest hit.

The death toll could rise because information from coastal areas was so far spotty.

Rescuers had been unable to reach large parts of the affected areas because of flooding and roads blocked by fallen trees and power lines. Telephone and electrical service was out, and disaster management officials were collecting accounts of deaths and damage from local officials via mobile phones.

Widespread damage and the destruction of houses were reported across the coast in a storm whose maximum winds were measured at 240 kilometres per hour.

In the capital, Dhaka, trees were downed and electricity was out.

After Sidr made landfall late Thursday, it lashed Bangladesh's entire coast but has since weakened. Storm surges have decreased from 6 metres to 1 to 1.2 metres, officials said.

Up to 1 million people had been evacuated from coastal villages ahead of the storm, and airports, seaports and ferry stations in southern Bangladesh were closed.

Aid workers also used megaphones to warn people in remote fishing hamlets about the upcoming disaster. The strategy was credited with saving a large number of lives.

The situation in eastern India was much less severe. Sidr, which is named after a tree found in Arabian countries, crossed the coast there overnight without causing much damage and later veered away from the region where tens of thousands had been evacuated, news reports said.

The cyclone brought gales and torrential rains and crossed half the coastline of India's Orissa state, but it did not cause damage in the state's four districts that were placed on high alert, the PTI news agency reported, citing Orissa Relief Commissioner NK Sundaray.

Nearly 90,000 people living in coastal areas in India had been evacuated to safer locations since Wednesday evening - 30,000 of them in Orissa and more than 60,000 in adjoining West Bengal state, which borders Bangladesh.

However, there were reports that the cyclone caused some damage to vegetation in the mangrove forests of Sundarbans straddling West Bengal and Bangladesh, which is home to fishing communities and the endangered royal Bengal tiger.

At least 10 houses also collapsed Thursday as storm-whipped waves in the Bay of Bengal hit a coastal village near south India's Chennai city.

The waves reached a height of 3 metres and seawater entered nearly 200 houses, causing the evacuation of coastal communities, the NDTV network reported. Fishing boats and equipment on the beaches were also damaged, but there were no reports of injuries.

State agencies in Orissa, West Bengal and the territories of the Andaman and Nicobar islands continued to be on alert as weather officials said the storm would bring strong winds and heavy rains until Saturday and was expected to trigger floods in low-lying areas.

The low-lying flatlands of Bangladesh and neighbouring states in India are among the most flood-prone areas in the world. In 1970, about half a million people were killed in a cyclone while in 1999, a supercyclone killed 140,000 people in Bangladesh and killed 10,000 people and left 15 million homeless in Orissa.