The Department of Irrigation has issued an extended major flood alert for communities living in low-lying zones along the Deduru Oya Basin. The warning follows substantial rainfall recorded in the upper and middle catchments over the past 24 hours, which has increased the reservoir’s outflow. Spill gates at the Deduru Oya Reservoir are currently releasing water at an estimated rate of 33,000 cubic feet per second, heightening the possibility of flooding downstream.Based on recent observations and water-level readings, the Divisional Secretariat areas of Wariyapola, Nikaweratiya, Mahawewa, Kobeigane, Bingiriya, Pallama, Halawatha, Arachchikattuwa, and Rasnayakapura have been identified as potentially affected zones.
The flood warning first issued under Notification No. 01 at 6:30 a.m. on November 23, 2025, has now been extended for an additional 48 hours.
Authorities advise residents in these areas-and motorists travelling through them-to exercise maximum caution. Disaster management agencies have also been urged to implement appropriate preparedness and response measures.
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