Dhaka, May 8 -- After a week of respite from searing hot weather, a heatwave is sweeping across 11 districts as meteorologists predict it to spread in the coming days of summer.

In a bulletin of Wednesday evening, the Bangladesh Meteorological Department (BMD) said a mild heatwave was blowing over Khulna Division alongside Sirajganj district.

Khulna and Chuadanga recorded the highest temperature at 3.8degC while the mercury topped at 35.7degC in Dhaka.

Meteorologist Omar Faruq said, "The temperature will continue rising until Sunday before dropping from the following day. The heatwave won't dissipate in a day after starting to diminish, rather it'll happen gradually."

When the mercury rises to between 36 and 38 degrees Celsius, meteor...