Brutal heatwave scorches eastern US ahead of Fourth of July weekend

Key Points:

• A prolonged and dangerous heatwave is affecting the central and eastern United States, with temperatures ranging from 95F to 105F and heat index values between 100F and 115F expected through the Independence Day weekend.
• The National Weather Service (NWS) has issued extreme heat warnings across multiple regions, including the Mississippi Valley, Great Lakes, Ohio Valley, and Northeast, highlighting the risk of record-breaking temperatures and severe health hazards.
• New York City experienced its first 100F day since 2012, with heat indices potentially reaching 115F; city officials are deploying cooling vans and urging residents to stay hydrated and limit outdoor activities.
• State and local leaders, including New York Governor Kathy Hochul and Washington DC Mayor Muriel Bowser, are encouraging energy conservation and safety precautions amid heavy strain on electric grids and ongoing extreme heat warnings.
• Thunderstorms and severe weather are possible in some areas later in the week, and events such as Philadelphia’s Independence Day parade have been modified due to the extreme heat conditions.