CNBC
Extreme heat wave threatens U.S. power grids and July 4 travel
Friday, July 3, 2026
A heat wave is expected to affect U.S. power grids during the week of July 4. The National Weather Service issued heat advisories for multiple regions. Grid operators have advised utilities to prepare for increased demand, and transportation officials stated that travelers should monitor conditions before departing.
Original reporting: https://www.cnbc.com/2026/07/03/extreme-heat-us-power-grids-july-4-travel.html