The National Weather Service says the advisory will be in effect from 11 a.m. until 8 p.m. Tuesday, July 14.
Heat index values—the temperature it feels like when humidity is factored in—are expected to range from 96 to 103 degrees. The combination of high temperatures and humidity could lead to heat-related illnesses.
Forecasters said the advisory may need to be extended into Wednesday as another hot day is looking increasingly likely across portions of central Pennsylvania.
Residents are encouraged to drink plenty of fluids, avoid prolonged exposure to the sun and remain in air-conditioned locations whenever possible. Officials also recommend checking on relatives and neighbors, particularly older adults and others who may be vulnerable to extreme heat.
Pets should be provided with plenty of fresh water and adequate shelter from direct sunlight. Children and animals should never be left unattended inside parked vehicles.
Anyone spending time outdoors should know the symptoms of heat exhaustion and heat stroke. Heat exhaustion may cause heavy sweating, weakness, dizziness, nausea and headache. Heat stroke is a medical emergency and may include confusion, loss of consciousness and a high body temperature. Call 911 immediately if heat stroke is suspected.
Pennsylvania Counties listed in this advisory are:
The Heat Advisory includes the following 21 counties:
- Cameron
- Centre
- Clinton
- Columbia
- Dauphin
- Elk
- Juniata
- Lebanon
- Lycoming
- McKean
- Mifflin
- Montour
- Northumberland
- Perry
- Potter
- Schuylkill
- Snyder
- Sullivan
- Tioga
- Union
- Warren