WEST CHESTER, PA — Chester County health officials have issued the county’s first Extreme Heat Health Alert of 2026 through Saturday as forecasters predict dangerously high temperatures and heat index values that could increase the risk of heat-related illness.
The Chester County Health Department said the alert was issued in response to National Weather Service forecasts and could be extended if hazardous conditions continue beyond Saturday.
The warning carries particular significance for older adults, infants, people experiencing homelessness, outdoor workers, pregnant women and individuals with chronic health conditions, according to county health officials.
Health Department Director Jeanne Franklin said residents should take precautions during the heat event and monitor family members, friends and neighbors who may be vulnerable.
“Extreme heat can pose a health risk to anyone, but it’s especially dangerous” for populations with elevated health risks, Franklin said.
Officials are urging residents to remain hydrated, limit strenuous outdoor activity during the hottest parts of the day and seek air-conditioned environments whenever possible. The department also warned residents never to leave children, older adults, people with disabilities or pets unattended in vehicles.
For residents without air conditioning, county officials recommend using cooling centers, libraries, senior centers and community pools. The county has published a cooling center locator at https://bit.ly/ChesCoHeatRelief.
The department noted that fans alone may not provide sufficient protection when temperatures exceed 90 degrees Fahrenheit and encouraged residents to use additional cooling measures such as air conditioning or cool showers.
Health officials also advised checking on neighbors, relatives and friends who may be at increased risk during the heat event and ensuring that outdoor pets and livestock have access to shade and water.
The county reminded residents that symptoms of heat-related illness can include nausea, dizziness, excessive sweating and muscle cramps. Individuals experiencing those symptoms should move to a cooler location and seek medical attention if conditions worsen.
Officials emphasized that heat stroke is a medical emergency. Symptoms can include a high body temperature, headache, dizziness, nausea, confusion and fainting. Anyone suspected of experiencing heat stroke should be moved to a cooler area while 911 is contacted immediately.
Residents seeking assistance with housing or utility-related needs can contact the Human Needs Network of Chester County by dialing 211 or texting their ZIP code to 898-211.
The county is also encouraging residents to register for emergency notifications through ReadyChesCo.org to receive future heat alerts by text message, email or phone.
Additional information about extreme heat safety is available at chesco.org/heat.
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