Heat Wave Raises Power Demand and Prompts Travel Advisories Across Eastern U.S.

A prolonged heat wave across the central and eastern United States is expected to continue into the Independence Day weekend, with temperatures reaching 105 degrees Fahrenheit in some areas. The National Weather Service said daily, monthly, and all-time records could be set. It also warned of increased risk for heat-related illness, especially for vulnerable populations.

Wholesale electricity prices jumped more than 243 percent in New England and 101 percent in New York City on Thursday, according to U.S. Energy Information Administration data. Prices also rose nearly 55 percent in the Midwest and 45.6 percent in the Mid-Atlantic.

New York City Mayor Zohran Mamdani urged residents to set air conditioners to 78 degrees, turn off unused electronics, and run appliances during off-peak hours.

m. m. through July 4 in the Northeast, Southeast, and Midwest. New Jersey Transit trains into New York were also expected to encounter delays and cancellations. Delta Airlines announced it will waive change fees for flights through New York's LaGuardia Airport this week.

The Illinois Department of Transportation warned drivers to watch for pavement buckling. Rail authorities have warned of potential delays through the weekend due to the extreme temperatures.