The warning covers Divulapitiya, Mirigama, Attanagalla, Mahara, Gampaha, Minuwangoda, Ja-Ela, Katana and Wattala.
According to the Irrigation Department, significant rainfall in the upper and middle catchment areas of the Attanagalu Oya Basin, coupled with the commencement of water releases through the spill gates of the Basnagoda Reservoir, has resulted in rising water levels in the river.
Based on measurements recorded at river gauging stations, the department has warned that flooding could occur in low-lying areas along the Attanagalu Oya and Uruwal Oya valleys within the coming hours.
Residents in the affected areas have been urged to remain vigilant and take necessary precautions. Motorists travelling along roads in these locations have also been advised to exercise extreme caution.
The Irrigation Department has further requested disaster management authorities to implement appropriate precautionary measures to minimise potential risks.
The flood warning was issued at 12.30 p.m. today (November 09) and will remain in effect until 12.30 p.m. tomorrow (November 10).
