The previous extreme rainfall events were St Louis on July 25-26, Eastern Kentucky on July 28, and Southern Illinois on August 2.
On Friday, August 5, Furnace Creek in Death Valley received 37.1 mm (1.46 inches) of rainfall in a couple of hours, breaking the previous rainfall record for August 5, set in 1936 at 27.9 mm (1.10 inches).
Friday's total is 10.9 mm (0.42 inches) below the park's annual precipitation average of 48 mm (1.9 inches).
The resulting floods stranded 1 000 visitors and staff in Death Valley National Park. By August 6, the flood water had mostly receded, and the stranded visitors were able to exit the park escorted by National Park Service personnel.
Death Valley, the hottest and driest place in the US just saw the 4th 1-in-1,000 year rain event in less than 2 weeks in the US.— Colin McCarthy (@US_Stormwatch) August 9, 2022
3/4 of Death Valley's annual rainfall fell in 3 hours. pic.twitter.com/0DK6HNNZTq