The water levels of several rivers and reservoirs have risen sharply owing to heavy showers in the South-Western and Central regions of the country.
Director of Irrigation, Engineer SPC Sugeeshwara said certain parts of the country are continuously receiving rainfall.
He said residents of Galle, Matara and Gampaha must be vigilant of rising water level.
Engineer SPC Sugeeshwara said the water levels of the Attanagalu Oya, Maha Oya, Kelani and Kalu rivers have increased considerably.
Meanwhile, two spill gates of the Kukulegama reservoir have been opened following heavy rains.
The Director of Irrigation requested those residing in low-lying areas to remain vigilant. He also added that flood warnings issued to residents of Palindanuwara and Bulathsinhala Divisional Secretariat areas are still in place.
Meanwhile, the Department of Meteorology predicts showers or thundershowers at times in the Western, Sabaragamuwa and North-western provinces and in the Kandy, Nuwara-Eliya, Galle and Matara districts.
The Met Department said fairly heavy showers above 50mm can be expected at some places in the Western, Sabaragamuwa and North-western provinces and in the Galle and Matara districts.
It added, showers or thundershowers will occur at several places in the Eastern and Uva provinces during the evening or night.