The map below, updated late Monday night, shows the highest potential peak storm surge heights including tides. Forecasters noted that the timing of peak surge and high tide in a given area, and whether they coincide or not, will ultimately determine how destructive the inundation will be.

Tropical Storm Debby is heading toward Florida and may strengthen into a hurricane before making landfall early Monday. Heavy downpours have already begun in southern Florida and portions of the state’s Big Bend region may experience hurricane-force winds as well as a “life-threatening” storm surge Monday.