Bangladesh Meteorological Department (BMD) has forecast light to moderate rain or thundershowers accompanied by temporary gusty wind in many parts of the country commencing around  9 am on Tuesday. Read: Incessant rains: Parts of Chattogram city go under water “Light to moderate rain or thunder showers accompanied by temporary gusty wind is likely to occur at most places over Dhaka, Mymensingh, Barishal, Chattogram  and Sylhet divisions and at many places over Rangpur, Rajshahi and Khulna divisions with moderately heavy to heavy falls at places over the country,”said a Met office bulletin. Mild heat wave is sweeping over the regions of Faridpur, Rajshahi, Pabna, Sirajganj & Kushtia and it may abate. Read:Lightning strikes kill four in Dhaka amid rain As per the synoptic situation, southwest monsoon has advanced up to Chattogram, Barishal, Dhaka, Sylhet and Mymensingh divisions. Conditions are favourable for further advancement of Southwest monsoon over remaining parts of the country. Monsoon is active over eastern part of the country and moderate over Northeast Bay, it added. Read:Rains bring much-sought relief from heat Day temperature may fall by (1-2)°C and night temperature may fall slightly over the country.