Heat exhaustion is strongly related to the heat index, which is a measurement of how hot you feel when the effects of relative humidity and air temperature are combined. A relative humidity of 60% or more hampers sweat evaporation, which hinders your body's ability to cool itself.
Statistics (2015) Jacksonville International Airport (IATA: JAX, ICAO: KJAX, FAA LID: JAX) is a civil-military public airport 13 miles (21 km) north of downtown Jacksonville, in Duval County, Florida. It is owned and operated by the Jacksonville Aviation Authority.
Weather | Natural Extremes | Air Quality | Environmental Watch | Zip Codes | Government. Jacksonville is located in north Florida. Jacksonville is between the Duval, Saint Johns, Baker, Clay, Nassau county. Jacksonville has 747.00 square miles of land area and 127.63 square miles of water area.