Effects of Hurricane Irma in Florida
Irma was the first major hurricane to strike the state since Wilma in 2005 and the first Category 4 hurricane to make landfall in Florida since Charley in 2004. The storm made landfall in Florida on the same date as Hurricane Donna, the last Category 4 hurricane to strike the Florida Keys. Irma was only the second hurricane to hit Florida since Wilma, the other being Hermine in 2016. Due to few very intense hurricanes since Hurricane Andrew in 1992, there was concern that many Floridians never experienced or did not recall experiencing a hurricane as strong as Irma was projected to be at landfall, with significant growth in population and assets during the previous 25 years.
Biscayne National Park
Like many locations in southern Florida, Biscayne National Park is affected by hurricanes every few years. Most storms require temporary closings and occasional repairs to park facilities. A direct hit by a powerful hurricane can produce severe consequences, primarily by its impact on human interventions in the environment rather than on the natural environment of the park, which is well-adapted to these events. Significant hurricanes to strike Biscayne include storms in 1835 and 1904, the 1906 Florida Keys hurricane, the 1926 Miami hurricane, the 1929 Bahamas hurricane, the 1935 Labor Day hurricane, the 1935 Yankee hurricane, the 1941 Florida hurricane, the 1945 Southeast Florida hurricane, the 1948 Miami hurricane, Hurricane King in 1950, Hurricane Donna in 1960. Hurricane Cleo in 1964, and Hurricane Andrew in 1992. The park can be affected by wave action from more distant tropical storms such as 2012's Hurricane Sandy, which damaged facilities on Elliott Key.
On August 24, 1992, Hurricane Andrew came ashore just south of Miami, passing directly across Biscayne National Park with maximum sustained winds of , with gusts to . The storm surge was up to above mean sea level. It was a compact Category 5 hurricane on the Saffir-Simpson Hurricane Scale. Biscayne Bay was affected by bottom scouring and turbidity and with damage to its fringes of mangrove forest. Leakage from damaged boats and marinas polluted the bay with fuel, with discharges continuing for nearly a month after the hurricane's passage. A commemorative plaque was placed at the Dante Fascell Visitor Center in 2002 to commemorate the human and environmental cost of Andrew, and to celebrate the area's recovery from the storm's effects. The inscription reads in part: