Hundreds of thousands of people in Bangladesh and neighboring Myanmar have been evacuated, as Cyclone Mahasen approached one of the poorest countries in Asia with winds of around 100km per hour.

The United Nations said that more than 4.1 million people could be at risk from the cyclone, which started crossing the country's low-lying coast on Thursday.

Mahasen first hit Khepupara on on the southern coast and has started bearing down on the ports of Chittagong and Cox's Bazar.

Eyewitnesses told the Reuters news agency low-lying coastal areas were covered in waist-deep water as the storm crossed and trees were uprooted and houses damaged. Two people were reported killed, one crushed by a falling tree and another as he made his way to a shelter.

Bangladesh evacuated more than 700,000 people living in low-lying areas to thousands of cyclone shelters on Wednesday, while Myanmar announced plans to relocate about 166,000 people on its north-west coast.

The port in the Bangladeshi city of Chittagong and the airport in Cox's Bazar were closed on Wednesday as the storm was likely to intensify and bring a storm surge of up to 2.1 meters, authorities said.

The country has raised its storm warning to seven, on a scale with a maximum of 10.

The storm has already killed at least seven people and displaced thousands in Sri Lanka as it tracked across the Bay of Bengal towards Bangladesh.

However, in Myanmar's state of Rakhine, many Muslim Rohingya made homeless by communal bloodshed last year said they were too scared to move, reflecting their deep mistrust of the authorities and of local Buddhists.

"We could die here, we have no place to go," said Yu Sut Taw, a Muslim man living in a camp on the outskirts of the state capital Sittwe, one of several in Rakhine which are home to a total of about 140,000 displaced persons.

Cyclone downgraded

AFP reporters who visited two camps on Wednesday saw few signs that a mass evacuation had begun.

Buddhist-Muslim clashes in the region last year left about 200 people dead and whole neighborhoods burned to the ground.

The danger faced by those trying to flee was underlined on Monday when 58 Rohingya were left missing after their boat capsized as they tried to escape by sea to higher ground along the coast.

About 30 million of Bangladesh's 153 million people live along the coast.

Mohammed Kamruzzaman, a government magistrate in charge of a Rohingya camp in the Bangladeshi town of Cox's Bazaar, said they used loudspeakers to warn people of the impending danger.

"We've also stockpiled dry food, kept medical teams and ambulances on standby and shifted the sick and pregnant women from the camps to hospitals," he said.

In Chittagong's export processing zone, all factories had been ordered closed as the cyclone approaches, Al Jazeera's Nicolas Haque reported.

Operations at the local airports in Chittagong and Cox Bazar's were suspended.

Local officials said 113 medical teams had been mobilized to deal with the impact of the cyclone and leave had been cancelled for all government employees.

Experts said Bangladesh was better prepared to handle cyclones than authorities across the border in Rakhine, where tens of thousands of Rohingya made homeless by communal unrest last year languished in flood-prone camps.

PHOTO CAPTION

Bangladeshi evacuees head towards shelters as Cyclone Mahasen moves towards landfall in Cox's Bazar on May 15, 2013.

Aljazeera