Heat Wave in Southeast Asia Closes Schools, Triggers Health Alerts. A severe heat wave across Southeast Asia has led to school closures and health alerts due to extreme temperatures. In the Philippines, schools were closed as temperatures are expected to reach 37 degrees Celsius, with a heat index that could hit a dangerous 45 degrees Celsius. This has also put significant pressure on the power grid, especially on Luzon Island. Thailand is experiencing similar conditions, with temperatures predicted to exceed 40 degrees Celsius, prompting warnings to limit outdoor activities. Vietnam and Malaysia have issued warnings regarding high temperatures and the associated health risks, such as dehydration and heat stroke. In Singapore, last year was one of the hottest on record, and the trend appears set to continue. Additionally, Indonesia is facing an increase in dengue fever cases due to the prolonged dry season and higher temperatures that favor mosquito breeding. The ongoing El Niño weather pattern is exacerbating these conditions, leading to heightened concerns over public health and safety in the region.