Malaysia has recorded two deaths and 56 heat-related illnesses since the beginning of 2026, with more than half of the cases linked to physical activity conducted under hot weather conditions, according to the Health Ministry.
In a statement issued on 3 May, the ministry said 58 per cent of reported cases were associated with outdoor exertion, particularly sports and training activities such as cross-country running, marathons and athletic drills. The remaining cases involved high-intensity duties performed by security and operational personnel.
Out of the total cases, 47 were classified as heat exhaustion, while others included four cases of exertional heat stroke, four cases of heat stroke and one case of heat cramps.
The ministry confirmed that both fatalities were caused by heat stroke. One involved a two-year-old child who was left inside a vehicle, while the other involved a 42-year-old man who participated in a marathon in Penang. Authorities noted that both incidents occurred even though weather conditions were below alert level 1.
Officials stressed that the findings highlight the serious risks of prolonged exposure to heat combined with intense physical activity, particularly when the body’s temperature regulation system becomes overwhelmed.
The ministry also warned that the main risk factors include exercising in extreme heat and working in enclosed or poorly ventilated environments, which can quickly lead to dehydration and heat-related complications.
Members of the public have been advised to reduce strenuous outdoor activities during hot weather, take frequent breaks in shaded areas, and maintain adequate hydration by drinking water regularly even without feeling thirsty.
Preventive measures also include wearing lightweight and light-coloured clothing, using protective items such as hats or umbrellas, and ensuring vulnerable groups such as children, the elderly and those with chronic illnesses are closely monitored.
The ministry further reminded parents and caregivers not to leave children unattended inside vehicles, and urged individuals experiencing symptoms such as dizziness, nausea, cramps or extreme fatigue to seek immediate medical attention.
