The San Francisco Bay Area is currently grappling with an unprecedented heat wave for the month of March, with inland temperatures soaring into the low to mid-90s and coastal areas experiencing warmth in the 80s. This unusual weather pattern has prompted the National Weather Service to issue a heat advisory, effective until Friday evening, marking the first such advisory ever issued for the region in March. The unseasonably high temperatures, expected to be 20 to 30 degrees above normal, are part of a broader weather phenomenon affecting the western United States, with potential record highs extending as far east as Arkansas and Montana.