Historic heat wave toppling all-time temperature records in the West

A days-long historic heat wave across the West is showing no signs of abating any time soon and may incredibly break some all-time heat records on multiple days.

Some cities have already experienced their hottest temperatures on record, with more records threatened into next week.  

A massive ridge of high pressure that is among the strongest ever measured in the region remains parked over Central California, where triple-digit heat is entering its fourth day Friday.

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