Dry and hot weather is likely to continue until a fresh spell of rain eases the ongoing heatwave on May 6, meteorologists said.
The next spell of rain is likely to continue through May 10 all over Bangladesh, the BMD said, forecasting a major retreat in the ongoing heat condition that has continued since March 31.
鈥楾he heatwave is likely to disappear briefly from all over Bangladesh,鈥� meteorologist AKM Nazmul Haque told 抖阴精品.
He, however, warned that lightning might occur during the rain.
On Friday, Bangladesh鈥檚 highest maximum day temperature of 41.8C was recorded in Jashore, with a mild to severe heatwave sweeping over most of the country except for Sylhet and Chattogram divisions.
Dhaka鈥檚 highest maximum day temperature was 38.1C.
In its monthly outlook released on May 2, the Bangladesh Meteorological Department said that the average temperature in April was 3C hotter than the average normal temperature over certain 30 years.
The average day temperature in April was 3.2C higher than the average normal, the BMD said, adding that the average night temperature, on the other hand, was 2.8C higher than the average normal.
The April temperature registered a stark contrast to March when the average day temperature was found 3C lower than the average normal.
In its outlook, the BMD said that a mild to severe temperature swept Bangladesh between April 1 and 19, while the days in the rest of the month were swept by a severe to very severe heatwave.
The average rainfall recorded in April was 81 per cent less than the average normal, with far less rain than the average normal recorded almost all over Bangladesh except for Sylhet division, which had almost normal rainfall.
Rajshahi and Rangpur divisions did not see any rain in April, while the month was 91 per cent rain deficient in Dhaka compared with the normal average rainfall, the BMD outlook said.
The BMD predicted normal rainfall in May with days of hailstorms and nor鈥檞ester.
The day temperature, however, is likely to increase from May 12, potentially leading to another heatwave that could see the temperature reach or cross 40C.
The BMD also predicted two low pressures to form over the Bay of Bengal in May, with one of them likely to intensify into a cyclonic storm.
The rivers in the north and northeast might rapidly swell depending on rain聽 upstream across the border in India, flowing close to danger level at some points.
The Sumra River continued to flow 13cm above its danger mark at Kanaighat in Sylhet on Friday.
Between Thursday and Wednesday mornings, the Surma rose 1.65m above the danger mark at Kanaighat, while the Sarigowain River rose 3.82m at Sarighat, flowing up to more than 1 metre above their danger mark.
Government officials in Kanaighat and Gowainghat said that the abnormal rise in the rivers was caused by days of heavy rain inside Bangladesh and upstream in India.
The onrush of water from upstream sank low-lying areas and caused brief waterlogging in parts of the bordering areas.
The India Meteorological Department predicted fairly widespread to widespread rainfall in upstream India over the next five days, with heavy to very heavy falls in Arunachal Pradesh, Assam and Meghalaya, Sikkim, Nagaland, Manipur, Mizoram, and Tripura on May 5 and 6.
In the 24 hours between Thursday and Friday, IMD reported 86 per cent excess rainfall in Arunachal Pradesh while Manipur recorded 232 per cent excess rain, Mizoram 251 per cent and Tripura 249 per cent.
