The National Building Research Organization has issued a warning to four districts with a potential risk of landslides if the rain continues for the next 24 hours.
The warning has been issued to Rathnapura, Kalutara, Galle and Matara Districts.
The met department states that the Prevailing showery weather in the South-western part is expected to reduce to some extent after tomorrow.
Showers or thundershowers will occur at times in the Southern, Central, Western, North-western and Sabaragamuwa provinces and in the Mannar district.
Fairly heavy falls about 100 mili meters can be expected at some places.
Misty conditions can be expected at some places in Western, Sabaragamuwa, Central and Southern provinces during the morning.