The Department of Meteorology has issued a severe lightning advisory for Western and Sabaragamuwa provinces and several districts.
Thundershowers with severe lightning are likely after 2.00 p.m. in Galle, Matara, Kandy, Nuwara-Eliya and Kurunegala districts.
Temporary strong winds may occur during thundershowers, the department stated.
The public has been advised to take precautions to minimise damage from lightning.