The National Building Research Organisation (NBRO) has issued landslide early warnings for selected areas in Gampaha, Ratnapura and Kalutara districts.
The warning will remain in effect until 3.00 a.m. tomorrow (23).
Level 2 (Amber) warnings have been issued for Attanagalla, Kuruwita and Ratnapura Divisional Secretariat Divisions.
Level 1 (Yellow) warnings are in place for Bulathsinhala and Eheliyagoda.
Residents in affected areas have been advised to remain vigilant.