Florida Keys National Marine Sanctuary

Heat Advisory issued July 4 at 2:01AM EDT until July 4 at 8:00PM EDT by NWS Miami FL

* WHAT...Heat index values between 105 and 110 expected across Miami Dade, Broward, and Palm Beach metro areas. * WHERE...Coastal Broward County, Coastal Miami Dade County, Coastal Palm Beach County, Metro Broward County, Metro Palm Beach County, and Metropolitan Miami Dade Counties. * WHEN...From 11 AM this morning to 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.