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US Heatwave: Record Temps Spark Emergency Measures
2 Jul
Summary
- Dangerous heatwave affects 26 states and DC, with heat index up to 115 F.
- New York City opens cooling centers and mobile medical units.
- US power grid faces emergency orders due to high demand from AC use.

A severe heatwave is currently engulfing the central and eastern United States, prompting widespread emergency measures as temperatures and humidity levels soar ahead of the July 4th holiday weekend. The National Weather Service has issued Extreme Heat Warnings across 26 states and Washington, D.C., forecasting heat index values that could reach 115 F in some densely populated areas including New York City, Philadelphia, and Boston.
New York City has implemented an expansive heat-response plan, opening hundreds of cooling centers, providing outreach to vulnerable populations, and deploying mobile cooling units. Mayor Mamdani urged residents to conserve energy by setting air conditioners to 78 degrees, a recommendation that sparked some debate online regarding comfort levels during extreme heat.
Concerns about the power grid's ability to cope with soaring demand are significant. The U.S. Department of Energy has issued emergency orders for the PJM Interconnection region, the nation's largest power grid operator serving millions across 13 states and D.C. These orders authorize the dispatch of electricity units and the use of backup generators to prevent potential blackouts, as peak electricity demand is predicted to surpass previous records.
Across the country, states are bolstering protections for animals. Indiana enacted a new law allowing people to break into hot vehicles to rescue pets in immediate danger, joining several other states with similar Good Samaritan laws. Meanwhile, utilities like Commonwealth Edison in Illinois are warning of "critical strain" on local electrical systems and urging customers to reduce power consumption to prevent outages.