KUALA LUMPUR, Oct. 21 -- The Malaysian Meteorological Department (MetMalaysia) has issued a thunderstorm warning for several areas in Perak and Sarawak this morning.

In a post on Facebook, the department said thunderstorms, heavy rain and strong winds are expected in Perak - particularly in the districts of Manjung, Kinta, Perak Tengah, Kampar, Bagan Datuk and Hilir Perak - and across parts of Sarawak, including Kuching, Samarahan, Betong, Pakan, Julau, Sibu, Mukah, Kapit and Bintulu.

The warning remains in effect until noon today (Tuesday, October 21).

MetMalaysia explained that such alerts are issued when there are indications of thunderstorms with rainfall intensity exceeding 20 millimetres per hour, expected to occur or persist for...