The National Building Research Institute [NBRI] has issued Landslide Early Warnings to the Districts of Colombo, Gampaha, Kalutara, Kegalle, Nuwara Eliya and Ratnapura valid upto 0900 AM on 23rd May 2026.

Accordingly,
LEVEL I [RED] landslide early warnings have been issued to the Divisional Secretaries Divisions and surrounding areas of  Deraniyagala, Ruwanwella and Dehiowita in the Kegalle district and Ratnapura, Ayagama, Kuruwita and Eheliyagoda in the Ratnapura district.

LEVEL II [AMBER] landslide early warnings have been issued to the Divisional Secretaries Divisions and surrounding areas of Seethawaka and Padukka in the Colombo district, Attanagalla in the Gampaha district,  Horana, Bulathsinhala, Ingiriya and  Palindanuwara in the  Kalutara district, Yatiyanthota in the Kegalle district and Pelmadulla,  Kiriella,  Elapatha,  Kalawana and Nivithigala in the Rathnapura district.

LEVEL I [YELLOW] landslide early warnings have been issued to the Divisional Secretaries Divisions and surrounding areas of Mirigama and Divulapitiya in the Gampaha district, Agalawatta and Mathugama in the Kalutara district, Bulathkohupitiya in the Kegalle district and Ambagamuwa in the Nuwara Eliya district.

Based on the heavy rainfall currently being received in the Kalu River Basin and the analysis of water level data recorded at hydrological gauging stations maintained by the Irrigation Department within the Kalu River Basin, it is hereby warned that a Minor Flood Situation is likely to occur within the next
few hours in the low-lying floodplain areas of the Kalu River.

The affected areas include the Divisional Secretariat Divisions of Ratnapura, Kuruwita, Ayagama, Elapatha, Kiriella in Ratnapura District.

The public residing in these areas, as well as motorists and passengers travelling through the affected regions, are strongly requested to act with utmost vigilance and to take all necessary
precautions. Disaster Management Authorities are requested to take necessary actions in this regard.

A considerable rainfall has  occurred in the catchment areas of the Aththanagalu Oya Basin as atb5.00 AM today (22).

By analyzing the current rainfall situation and river water levels of Hydrological Stations on the Aththanagalu Oya, there is a possibility of  a flood situation occuring in some low lying
areas of the Aththanagalu Oya and Uruwal Oya valleys situated in Diwulapitiya, Mirigama, Attanagalla, Mahara, Gampaha, Minuwangoda, Ja-ela, Katana and Wattala Div8sional Secretaries Divisions within next 48 hours.

Owing to this situation, there is a possibility of some of the roads running through these lowlying  areas being inundated  at some places.

The public residing in these areas, as well as motorists traveling through these regions, are requested to exercise extreme caution regarding this situation.