US Braces for Nationwide Heat Wave: What to Know
EASTERN US AND PARTS OF CANADA, JUN 22 – More than 190 million people face extreme heat warnings as a heat dome traps hot air, causing record highs and health risks across the eastern US and parts of Canada, officials said.
- In June 2025, a major heat wave affected large areas across the central and eastern United States, with extreme heat warnings issued through Wednesday in New Jersey and other states.
- The heat wave began around June 20 and spread eastward, driven by persistent high temperatures and humidity that increased heat indices above 100 degrees in many cities.
- Temperatures were forecast to reach highs near 99 to 103 degrees in New Jersey, with heat indices ranging between 100 and 110 degrees, while warnings covered all 21 counties in the state.
- The National Weather Service urged residents to stay hydrated, avoid sun exposure, stay in air-conditioned spaces, and check on elderly or vulnerable neighbors, emphasizing risks from prolonged heat exposure.
- The heat wave was expected to break by Thursday with cooler temperatures and scattered thunderstorms, but above-average temperatures will remain into next week, sustaining some health risks.
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