Wednesday was a hot day in Vietnam, with temperatures rising at their highest to 36 degrees celsius (96.8°F) at Tan Son Nhut international airport in Ho Chi Minh City. But according to Vietnam’s foreign ministry, the highest temperature recorded in May is 39°C (102.2°F) in Ho Chi Minh City, and 42°C (107.6°F) in Hanoi. The Hanoi record was registered in 1926.