Several poorly maintained dykes and dams in Bangladesh broke down even before Cyclone Amphan made landfall on Wednesday, causing extensive flooding in parts of the country.

Snigdha Chakraborty with charity Catholic Relief Services said the country saw storm surges as high as 15 feet (4.5 meters), inundating houses throughout the country.

A total of 12,078 cyclone shelters were prepared throughout the country's coastal regions, where over 2 million people were evacuated. About 40,000 livestock animals were also evacuated.

Though there has been significant damage across the coast, major destruction has not been reported so far in the refugee camp's near Cox's Bazar, where nearly 1 million Rohingya Muslims who fled violence in Myanmar currently live, Chakraborty said.

Some weak shelters were damaged in the storm and now need to be repaired, she said.

There was concern that the precipitation from the storm -- though it made landfall on the other side of Bangladesh -- could cause landslides in the refugee camps. Those living there already are subject to squalid conditions, and there is concern that a Covid-19 outbreak could arise in the camps after cases were reported last week.