July 4 weekend may bring record-breaking heat to the Triangle
AI-generated summary reviewed by our newsroom.
- A heat wave is expected in the Triangle starting July 1, worst July 2–4.
- Daytime highs could reach the high 90s to low triple digits and feel like 105–110°F.
- Nighttime lows mid 70s to low 80s; a low in the 80s would be a first.
When meteorologist Ryan Maue posted on X Thursday that Raleigh could hit 107 degrees the weekend of the nation’s 250th birthday, he described North Carolina as “ground zero” for a “mega heat dome over the Eastern U.S.”
A “heat dome” is more of a buzzword than a technical term, National Weather Service meteorologist Gail Hartfield told The News & Observer on Friday. But the phrase’s alarm is appropriate.
“It’s good if it increases people’s attention to dangerous heat,” she said.
A heat wave is expected to develop in the Triangle on July 1 and stick around for the July Fourth weekend, according to the National Weather Service’s Hazardous Weather Outlook.
How hot could it get?
Temperatures at their peak could reach the high 90s to the low triple digits, with overnight readings from the mid 70s to the low 80s.
The heat wave could beat the Triangle’s current record set in 2024, when temperatures hit 101 degrees on July 4 and 106 degrees on July 5, according to the NWS’ RDU airport temperature records.
A low temperature in the 80s would be a first in the Triangle — the highest minimum temperature recorded was 79 degrees in 1902.
Why is it so hot?
A low pressure system on the West Coast is producing a mid and upper level high pressure ridge that will camp over the central and eastern parts of the U.S. for several days, Hartfield said.
The high pressure system allows air in the atmosphere to sink and warm up, so it isn’t collecting as much moisture from the Gulf Coast or Atlantic Ocean, Hartfield said. There are fewer clouds and less wind, while more sunshine bears down from the Dakotas to Texas and much of the East Coast.
Hartfield said the worst heat will come July 2 through July 4, with possible relief on July 5. Even the nighttime won’t quell the heat wave.
“So [we’re] looking at a particularly dangerous situation,” Hartfield said. “And we are looking at, potentially, records being broken — not necessarily just daily records, but perhaps monthly and maybe all-time.”
How should I prepare?
If you have an outdoor event, try to move it to the early morning or evening, Hartfield said. And if you plan to go outside, take frequent breaks from the heat. Stay hydrated, stay in the shade and well-ventilated areas and avoid direct sunlight. Consider a cold compress or keeping towels cold to use on your head, neck and pulse points.
Knowing the signs of the heat illness will also be key, especially if you have pre-existing health conditions, Hartfield said. Symptoms can include nausea or dizziness, feeling faint or weak or feeling confused, and require immediate medical care.
“Someone may not know they are succumbing to a heat illness,” Hartfield said. “But someone else may notice, ‘Hey, man, you’re not making a lot of sense. You might want to sit over here in the shade.’”
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