A heat advisory is a notice issued by the National Weather Service of the United States. Although local weather agencies often set their own standards, the general definition of a heat advisory is when high temperatures reach anywhere between 90°F (32°C) and 95°F (35°C). Such high temperatures like this may cause heat stroke.
The following is an example of a heat advisory issued by the National Weather Service office in Pittsburgh, Pennsylvania.[1]
URGENT - WEATHER MESSAGENational Weather Service Pittsburgh PA341 PM EDT Wed Jul 8 2020OHZ039>041-048>050-057>059-068-069-PAZ020-021-029-031-073-075-WVZ001>004-012-021-509-090345-/O.NEW.KPBZ.HT.Y.0001.200709T1700Z-200710T0000Z/Tuscarawas-Carroll-Columbiana-Coshocton-Harrison-Jefferson OH-Muskingum-Guernsey-Belmont-Noble-Monroe-Beaver-Allegheny-Washington-Greene-Westmoreland-Fayette-Hancock-Brooke-Ohio-Marshall-Wetzel-Marion-Monongalia-Including the cities of New Philadelphia, Dover, Carrollton,Malvern, East Liverpool, Salem, Columbiana, Coshocton, Cadiz,Steubenville, Zanesville, Cambridge, Martins Ferry,St. Clairsville, Caldwell, Woodsfield, Aliquippa, Beaver Falls,Ambridge, Monaca, Pittsburgh Metro Area, Washington, Canonsburg,Waynesburg, Murrysville, Greensburg, New Kensington,Lower Burrell, Latrobe, Monessen, Uniontown, Weirton, Follansbee,Wellsburg, Wheeling, Moundsville, New Martinsville, Fairmont,and Morgantown341 PM EDT Wed Jul 8 2020...HEAT ADVISORY IN EFFECT FROM 1 PM TO 8 PM EDT THURSDAY...* WHAT...Heat index values up to 102 expected.* WHERE...Portions of southwest and western Pennsylvania, east central Ohio and northern and the northern panhandle of West Virginia.* WHEN...From 1 PM to 8 PM EDT Thursday.* IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur.PRECAUTIONARY/PREPAREDNESS ACTIONS...Drink plenty of fluids, stay in an air-conditioned room, stay outof the sun, and check up on relatives and neighbors. Youngchildren and pets should never be left unattended in vehiclesunder any circumstances.Take extra precautions if you work or spend time outside. Whenpossible reschedule strenuous activities to early morning orevening. Know the signs and symptoms of heat exhaustion and heatstroke. Wear lightweight and loose fitting clothing whenpossible. To reduce risk during outdoor work, the OccupationalSafety and Health Administration recommends scheduling frequentrest breaks in shaded or air conditioned environments. Anyoneovercome by heat should be moved to a cool and shaded location.Heat stroke is an emergency! Call 9 1 1.&&$$