That Deline record broke the previous record of 39.4 C recorded in Fort Smith on July 18, 1941, something that has escaped notice on some fronts . There's an Environment Canada climate station — built and maintained to exacting World Meteorological Organization standards — and a NAV Canada temperature sensor at the Fort Smith airport that isn't. The Environment Canada sensor generally provides official temperature records, but it was preoccupied on June 30. "We can't say that's an official record." "The previous record for June 30 in Fort Smith was 31.7 C and that was set in 1955," Hoffman said.

Source: CBC News July 21, 2021 09:00 UTC