Philadelphia is entering the most dangerous phase of a period of extreme heat that started Wednesday.
Here’s what you need to know about the hot weather.
The National Weather Service has extended an excessive heat warning beyond the region’s urban core to cover Eastern Pennsylvania and all of New Jersey and Delaware. It is in effect until 10 p.m. Sunday.
The service says the most-dangerous heat and humidity will occur from mid-afternoon into the early evening each day for the next three days. And don’t expect any real relief at the Jersey Shore.
Heat index values area expected to be in the 102- to 107-degree range Friday afternoon and the 108- to 113-degree range on Saturday afternoon and Sunday afternoon.
The air temperature could hit 100 degrees on Saturday for the first time in seven years in Philadelphia.
A cold front packing thunderstorms and potentially heavy rainfall should bring relief by Tuesday.
Are utilities are bracing for a surge in electricity usage. Money-saving tips, courtesy of PSE&G and NRG, include:
Residents are urged to drink plenty of fluids, stay in air-conditioned rooms, stay out of the sun, and check up on relatives and neighbors.
“We strongly urge the public to visit older friends, relatives and neighbors to ensure that air conditioners or fans are working and homes are adequately ventilated. In a heat wave, the majority of the victims are older people and those with pre-existing medical conditions,” Health Commissioner Thomas Farley said.
Due to the excessive heat, all public pools in Philadelphia will operate on a free swim schedule until further notice. A listing of all public pools in Philly can be found here.
Heading to the Shore? Check out which New Jersey and Delaware beaches are open, and which are closed or under advisory.
» READ MORE: How to stay hydrated this summer
Some neighborhoods get hotter than others, too. Using a map the Inquirer published last summer, you can see which Philly neighborhoods tend to be warmer or cooler than others, due to a number of factors.
Philadelphia has declared a heat health emergency. In these situations — the current heat emergency is in place through 11 p.m. Monday — the city activates several tools to aid residents.
During a heat health emergency, you can call the city’s Heatline, a special helpline number, at 215-765-9040. Operators will give you tips for staying cool and you can talk to health department nurses about heat-related issues.
Additionally, residential utility shutoffs are discontinued until the emergency passes.
A heat health emergency was last in effect in Philly in July 2018.
Early warning signals:
Serious signs of heat stress:
Extreme heat also can have an impact on transportation, particularly overhead power lines that supply electricity to SEPTA Regional Rail, N.J. Transit, and Amtrak trains.
No major problems have been reported.
SEPTA said that for passenger convenience due to the heat, there will be no A-B skip/stop service this week on the Market-Frankford Line. SEPTA has also done this in periods of extreme cold.
Prolonged heat waves can be especially dangerous for people living on the street. The city urges residents to call 215-232-1984 if they see someone who needs shelter from the heat or other homeless services.
Also remember that the heat can affect pets and that it is against the law in Philadelphia to leave dogs outside without protection from the sun when it’s hot.
You can get notified of a heat health emergency and other city alerts through the city’s free text notifications, ReadyPhiladelphia. Text READYPHILA to 888-777 to sign up.