"...this is the greatest statewide heat wave ever recorded in California,WU weather historian [View all]
The steamy, fiery summer of 2017 hit a new crescendo this weekend across the U.S. West, which is getting its hottest Labor Day weekend on record in many locationsand in some spots, the hottest weather ever observed. Overall, "this is the greatest statewide heat wave ever recorded in California, proclaimed WU weather historian Christopher Burt on Saturday night. Burt based his conclusion not only on the heats intensity but on its widespread nature well beyond Californias usual scorching locations. Even an escape to the cool Pacific shore was pretty much futile, as easterly downslope winds funneled scorching air from the interior into coastal sections that are normally mild and sometimes chilly even in midsummer. Readings also soared above 110°F across Californias Central Valley, although such heat is not quite so unusual for late summer in that area.
https://www.wunderground.com/cat6/heat-smoke-and-fire-assault-western-states-all-time-record-heat-california