MetMalaysia issued warnings for thunderstorms, heavy rain, and strong winds across several Malaysian states on May 4, 2026 [1, 2]. The warnings cover Perlis, Kedah, Penang, Perak, Pahang, Selangor, Negeri Sembilan, Melaka, Johor, Sarawak, and Sabah [1, 2].
Affected areas include densely populated zones such as the Klang Valley region encompassing Selangor, Kuala Lumpur, and Putrajaya, tourist areas like Langkawi, large parts of Perak, Cameron Highlands and other districts in Pahang, as well as several districts in Johor including Mersing and Johor Bahru. Multiple districts in Sarawak and Sabah are also under alert [1, 2].
Warnings are valid until the afternoon, though sources differ on the exact end time. Some advisories list 4 p.m. local time as the cutoff, while others extend it to 5 p.m. [3, 1, 2]. MetMalaysia typically issues short-term warnings when expected rainfall exceeds 20 millimeters per hour or the thunderstorm is forecast to last more than an hour [2].
A noon advisory was first issued at 12:15 p.m., specifying warnings until 4 p.m. for Klang Valley and several states [2]. Later, at 2:30 p.m., a broader alert was released extending warnings to 5 p.m. for all affected states including Sarawak and Sabah [1].
Authorities urge residents and travelers in these areas to stay informed and take necessary precautions against adverse weather conditions. The warnings remain in effect for the rest of the afternoon on May 4.
