All-time national heat records have been set this past April and May in India, Thailand, Laos, Cambodia, and the Republic of Maldives. The unprecedented heat has killed hundreds in India and dozens in Thailand so far. But nothing in the record books can compare to what has recently occurred in Thailand: a large country with over 120 meteorological sites that has seen half of its official weather stations break their all-time heat records. Here are the details.

weatherhistorian, • 9:09 PM GMT on May 30, 2016