Daily weather observations were collected in downtown Tampa at what had been the U.S. Weather Bureau Office. In June 1946, the office was moved to Drew Field, which later became the site for Tampa International Airport. Record-keeping has continued there ever since.

More than 250 million people in the U.S.—nearly three quarters of the population—are experiencing moderate, major or extreme risk of heat effects on July 28, according to the National Oceanic and Atmospheric Administration’s National Weather Service.

Tampa temperatures hit triple digits Sunday for the first time in recorded history, the National Weather Service said. Why it matters: Extreme heat will continue into Tuesday, with a heat advisory in effect from noon until 7pm for much of the Tampa Bay area.