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First heat wave of the season. What to know

Once a heat wave is declared, expect highs in the 90s to last for days on end

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Editor's Note (June 20, 2024, 1030 a.m.): This story is no longer being updated. For the latest on the heat wave, click here.

The weather is heating up with what's looking like a heat wave lasting into next week.

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Here is what to expect and tips for staying safe as temps remain hot:

First heat wave of 2024 looking likely 🌡️

The heat keeps building this workweek with highs in the low 90s Tuesday and feeling like to mid 90s or hotter.

The high on Wednesday gets into the low 90s, but not as humid. It will be feeling like the mid 90s Thursday. The National Weather service issued a heat advisory for the next few days.

NBC10's Siobhan McGirl caught up with some pickleball players who got on the court in Washington Township early on Wednesday. To beat the heat, they were taking breaks in the shade and drinking lots of fluid.

Then changes come in a big way heading into the weekend as heat and humidity ramp up Friday, Saturday and Sunday with feels-like temps of 99 to 104 degrees. Temps could near records (or even break them) this weekend as an excessive heat watch is in effect through the weekend.

Feels-like temps on Saturday will push near or past triple digits in many neighborhoods.

Feels like temps on Saturday, June 22, 2024, should surpass 100 in some places.

Sunday is then shaping up to be the steamiest day with brutal feels-like temps approaching 105 degrees. The high on Sunday in Philadelphia is expected to be 98, which would break a record that dates back to the 1880s.

The only places where you will get relief from the heat (besides being in air conditioned space) is at the Jersey Shore.

Isolated storms are possible later on Friday, Saturday and Sunday, but aren't expected to break the heat.

Temps vs. feels-like temps for June 20-23.

High temps must hit 90 degrees or higher for three straight days for a heat wave to be declared.

The Philly region is dealing with a potential heat wave this week. NBC10's Rosemary Connors shares tips and places where you can stay cool during the blistering temperatures.

The 90s are expected to continue well into the following week. Should the temp get to 90 on Monday, June 24, the heat wave should extend through all of next workweek.

No big relief from highs in the 90s in the days to come.

Tips for dealing with heat, noticing signs of heat-related illness

The expected heat wave may last for the entire week and could lead to dangerous health conditions with little relief offered. Be sure to limit time exerting yourself outside, especially during the hottest parts of the day.

Ready.gov shares these heat tips:

  • Never leave people or pets in a closed car on a warm day.
  • If air conditioning is not available in your home go to a cooling center.
  • Take cool showers or baths.
  • Wear loose, lightweight, light-colored clothing.
  • Use your oven less to help reduce the temperature in your home.
  • If you’re outside, find shade. Wear a hat wide enough to protect your face. 
  • Drink plenty of fluids to stay hydrated.
  • Avoid high-energy activities or work outdoors during midday heat, if possible.
  • Check on family members, older adults and neighbors.
  • Watch for heat cramps, heat exhaustion and heat stroke.
  • Consider pet safety. If they are outside, make sure they have plenty of cool water and access to comfortable shade. Asphalt and dark pavement can be very hot on your pet’s feet.
As we are expecting feels-like temperatures to reach the triple digits, doctors and experts are providing tips for how kids and the elderly can stay safe during the heat wave. NBC10's Yukare Nakayama has those tips and more on how to stay cool and safe in the coming days.

Also, be aware of the signs of heat-related illnesses. A body temperature of 103 degrees or higher; red, hot and dry skin without sweat; a rapid, strong pulse; and dizziness, confusion or unconsciousness can all be signs of heat stroke.

Should you or a loved one have any of these symptoms, call 911 or go to the hospital immediately.

With summer here, it's important to know the dangers of high temperatures. Heat stroke can be dangerous. Here are some ways you can identify heat stroke and what you should do when you see some of its symptoms.

You can click this link from the National Weather Service for details on the signs of heat exhaustion, heat cramps and other heat-related illnesses.

In Camden County, New Jersey, a heat advisory is in effect.

“When temperatures rise to dangerous levels, remember to stay inside as much as possible, drink plenty of water, and contact a physician if you or a loved one is showing signs of heat stress,” Camden County Commissioner Virginia Betteridge, liaison to the Camden County Department of Health and Human Services, said.. “It is important that residents continue to check on vulnerable friends, family and neighbors to ensure that they are safe and able to stay cool.”

Places to cool off

In Philadelphia, cooling centers are open for seniors looking to beat the heat and city pools and spraygrounds are open for young folks looking to beat the heat.

Click here for a interactive map showing all the spots where people can cool off in Philadelphia during the heat wave. The Free Library of Philadelphia is also reminding people of several of its locations open to the public.

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On Tuesday, the city declared a Code Red Alert "until further notice." "If you see someone on the street who needs help call the outreach team at (215) 232-1984 or 911 for a medical emergency," the Philadelphia Office of Homeless Services posted on social media. "Visit https://bit.ly/PHLHeatTips for hot weather tips/info."

People looking for relief from the heat can also go to recreation centers and libraries far beyond just Philadelphia.

In Allentown, Lehigh County, the city is offering up pools at no cost to residents and opening up public buildings with air conditioning.

Stay ahead of whatever Mother Nature brings

Be sure to keep watching NBC10 News and have the most updated version of the NBC10 app downloaded to your device to get the latest weather forecasts and conditions in real-time.

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