According to the hourly obs from Furnace Creek in Death Valley CA they haven't been below 100 degrees since early Sunday morning when temps dipped to a frosty 94 degrees. Yesterday's low was 105, and today's low was 101 degrees- at least as far as the hourly readings. Spending a stretch of summer there would be as fascinating as spending some time up on Mt. Washington NH during the winter.
The ob from 3am yesterday morning is just insane. 108 degrees at 3am!