The Labor Day Hurricane, the most intense hurricane to strike the United States, makes landfall at Long Key, Florida, killing at least 400.

The 1935 Labor Day hurricane was an extremely powerful and devastating Atlantic hurricane that struck the southeastern United States in early September 1935. For several decades, it was the most intense Atlantic hurricane on record in terms of barometric pressure, 1-minute sustained winds, and the strongest at landfall by 1-minute sustained winds. The fourth tropical cyclone, third tropical storm, second hurricane, and second major hurricane of the 1935 Atlantic hurricane season, it is the first of four Category 5 hurricanes on record to strike the contiguous United States, along with Hurricane Camille (1969), Hurricane Andrew (1992), and Hurricane Michael (2018).