Extreme heat wave threatens U.S. power grids and July 4 travel

• Wholesale electricity prices jumped 243% in New England and 101% in New York City on Thursday as air conditioning demand soared, with increases of 55% in the Midwest and 45.6% in the Mid-Atlantic
• New York City officials asked residents to set air conditioning to 78°F and avoid using appliances during peak hours to reduce strain on the energy grid
• Amtrak warned trains may operate at reduced speeds with delays between 11 a.m. and 7 p.m. through July 4, while road surfaces face buckling risks and airlines are waiving change fees for affected routes

Summary

An extreme heat wave affecting the central and eastern U.S. is straining power grids and disrupting travel during the Independence Day weekend, with temperatures expected to reach 105°F (40.5°C). The National Weather Service warns of potential daily, monthly, and all-time temperature records.

Power Market Impact:

Wholesale electricity prices surged dramatically on Thursday:

• New England: +243%
• New York City: +101%
• Midwest: +55%
• Mid-Atlantic: +45.6%

The price spike reflects soaring demand for air conditioning amid high humidity. New York City Mayor Zohran Mamdani urged residents to set thermostats to 78°F, turn off unused electronics, and delay running major appliances until early morning or late night to ease grid strain.

Transportation Disruptions:

Multiple transit systems face heat-related challenges during one of the year's busiest travel periods:

• Amtrak warned of reduced train speeds and delays between 11 a.m. and 7 p.m. through July 4 across the Northeast, Southeast, and Midwest
• New Jersey Transit anticipated delays and cancellations due to heat-damaged equipment
• Delta Air Lines waived change fees for LaGuardia Airport flights
• Illinois DOT cautioned drivers about potential pavement buckling

Climate Context:

Scientists emphasize that climate change is increasing the frequency and intensity of extreme weather events, with fossil fuel combustion identified as the primary driver of the climate crisis. The heat wave poses particular risks to vulnerable populations without adequate cooling access.