The heatwave that set in on the first day of the monsoon worsened on Sunday.
The country鈥檚 highest maximum day air temperature of 37C was recorded in Sylhet, Sirajganj and Pabna.
The Bangladesh Meteorological Department said that the heatwave was sweeping over the divisions of Dhaka and Rajshahi and the districts of Rangpur, Dinajpur, Sylhet, Chandpur, Noakhali, Khulna, Bagerhat, Jashore and Barishal.
The BMD predicted that the heatwave might continue today, though the temperature might drop.
Rain is predicted at many places of Rangpur,聽 Mymensingh and Sylhet disvisions and at a few places of Rajshahi, Dhaka, Khulna, Barishal and Chattogram divisions today.
Heatwaves occurred more frequently during the monsoon since 2000, compared with its previous record in the preceding years from 1981, a study released by the Bangladesh Meteorological Department revealed earlier this year.
In the past year, heatwaves recurred during the monsoon, which extended from June to September.
Heatwaves, on the other hand, decreased in the pre-monsoon month of March, a trend that continued this year, according to the BMD.聽
With day temperature rising after days of wet spell triggered almost all over Bangladesh by cyclonic storm Remanl, load shedding returned.
Over 900MW of load shedding was recorded at 4:00pm on Sunday with 13,787MW of electricity produced against the demand of 14,750MW.
Bangladesh鈥檚 longest-ever heatwave lasted 37 days between March 31 and May 6 this year. At least 15 people died from heatstroke during the heatwave after April 22.
During the longest heatwave, the country鈥檚 highest day temperature of 43.8C was recorded in Jashore on April 30, the hottest day in over three decades. Day temperatures frequently exceeded 40C in Dhaka, which saw its peak at 40.5C on April 30, the second hottest day in the capital in the past 64 years.
Heatwaves in the monsoon are not unusual but rare.
Monsoon days are warm but they struggled to get as warm as 36C or even more in the past, frequently interrupted by rain.
Meteorologists said that monsoon days were now getting warm rapidly, apparently because of global warming.
The BMD confirmed that monsoon advanced to seven out of eight Bangladesh divisions, except for the south-west Khulna division.
