The first widespread, significant heat wave of the summer is underway, as a massive heat dome intensifies into the Fourth of July weekend.

CNN is tracking extreme heat conditions for Americans each day. See where the risks are greatest — and where high US temperature records might be broken.

July Nymex natural gas (NGN26 ) on Thursday closed up +0.122 (+3.79%). Nat-gas prices rallied to a 2.5-week high on Thursday and settled sharply higher on the outlook for hotter US weather, potentially boosting nat-gas demand from electricity providers to power air-conditioning.

As millions of Americans prepare to look skyward this Independence Day, a forecast map offers a glimpse of whether fireworks displays will dazzle or disappoint. Tomorrow.io’s interactive map forecasts viewing conditions for more than 2,

Fourth of July weather update: Millions across the eastern United States face dangerous heat this Fourth of July weekend, with temperatures potentially reaching 115 degrees Fahrenheit due to a heat dome.

July Nymex natural gas (NGN26 ) on Wednesday closed up +0.074 (+2.35%). Nat-gas prices moved higher on Wednesday as US weather forecasts shifted to hotter, potentially boosting nat-gas demand from electricity providers to power air-conditioning.

The 2026 U.S. Senior Open at Scioto Country Club faces sunny skies and potential weekend thunderstorms.

A dangerous ⁠heat wave upended Fourth of July celebrations across ​much of the central and eastern U.S. on Friday, forcing officials ‌to cancel or postpone ‌dozens of parades, concerts and fireworks displays as the ⁠nation marked ⁠its 250th birthday.