The Department of Irrigation says minor flooding is expected in the next few hours in low lying areas of the Attanaglu Oya, Kalu River and Kuda Oya owing to incessant rains.
Director of Hydrology of the Department SPC Sugeeshwara urged the public to remain vigilant of rising water levels.
He said flood warnings were issued yesterday in low lying areas of the Kala Oya, Deduru Oya, Maha Oya, Kelani River, Kalu River, Ging River and the Nilwala River.
He said residents in Ja-Ela, Gampaha and Attanagalle were warned of rising water levels of the Attanaglu Oya while the warnings will be effective till 10am tomorrow.
In the Kalutara District, Sugeeshwara said warnings were issued in Millaniya, Bulathsinhala, Baduraliya, Horana, Dodangoda, and Palindanuwara also valid till 10am tomorrow.