From the Archives: EIGHT DIE OF SUNSTROKE: Terrible Heat in Inyo Gold Fields Overcomes the Miners. Thermometer at Ballarat Registers 135 at Noon, Falling to 114 at Midnight.

The Washington Post Aug 1, 1906 Front Page

Thermometers back in the day were not all that reliable it's unlikely the temperatures measured in this article are correct. Unfortunately, at the extreme heat levels of the Death Valley region, that distinction doesn't leave one any less dead.