The Meteorology Department said today that rains will continue until June 27.
Fairly heavy showers of above 50 mm are also expected in Colombo, Rathnapura, Kegalle and Kaluthara districts in particular.
Thunder showers are expected in the Western, Sabaragamuwa, Central and North-Western provinces and in Galle and Matara districts and in Uva province and Batticaloa and Ampara districts after 2 p.m.
Temporary localized strong winds will blow during thundershowers.
The Meteorology Department urged the public to take adequate precautions to minimize damages caused by lightning.