A powerful cyclone is hitting the coastlines of Bangladesh and Myanmar after intensifying into the equivalent of a category-five storm.

Cyclone Mocha is bringing heavy rain and winds of up to 195kph or 120mph, which could see dangerous flooding on land around the Bay of Bengal.

Storm surges of up to four metres could swamp villages in low-lying areas.

There were fears of damage to the world’s largest refugee camp, Cox’s Bazar, home to nearly a million people.

Forecasters warned Cyclone Mocha could be the most powerful storm seen in Bangladesh in nearly two decades.

About 500-thousand people have been evacuated to safer areas.