US Sizzles Under Historic Heatwave Ahead of Independence Day Holiday

Historic US heatwave intensifies, millions under alerts ahead of July 4 holiday

A record-breaking heatwave spread from the Midwest to the eastern United States on Wednesday, bringing dangerous temperatures to tens of millions of people ahead of the July 4 holiday weekend.

Weather officials warned that “feels-like” temperatures could range between 100°F and 115°F (38°C to 46°C) across large parts of the country, increasing the risk of heat-related illnesses while placing additional strain on power grids already under pressure from soaring electricity demand.

The scorching conditions have disrupted daily life in several states. In Hill City, Kansas, where temperatures crossed 100°F, postal worker Sabrina Hooper described the heat as “completely debilitating” as she walked nearly 10 miles each day delivering mail. She said cooling off under lawn sprinklers offered brief relief during her route.

In Brownsville, Texas, residents voiced concerns over soaring electricity bills and the possibility of blackouts as air conditioners worked overtime. Local resident Dana Robles said cooling costs during peak summer months consume a significant share of her family’s income, adding that prolonged power outages could spoil food and worsen living conditions.

Chicago also experienced oppressive heat, prompting residents to prepare in advance. Many stocked up on groceries and cold beverages, while homeowners and tenants reported that air-conditioning systems were struggling to keep indoor temperatures comfortable despite functioning normally.

Local authorities urged people to remain indoors during the hottest part of the day, drink plenty of water and regularly check on elderly neighbours and other vulnerable residents. Chicago’s emergency management department also encouraged residents to request welfare checks for anyone who could not be contacted.

The extreme weather comes as Europe grapples with its own severe heatwave, underscoring scientists’ warnings that climate change is making heatwaves more frequent, longer-lasting and more intense across the globe.

New York City began feeling the effects of the heat on Wednesday, with officials launching an extensive response to protect residents. Hundreds of cooling centres were opened across the city, while specially equipped “cool vans” distributed drinking water, electrolyte drinks, sunscreen and meals to people seeking relief.

Mayor Zohran Mamdani said public swimming pools would remain open for extended hours over the Independence Day weekend, and libraries and municipal buildings would continue operating as cooling centres.

To reduce pressure on the electricity network, utility company Con Edison asked consumers to limit energy use during peak demand hours. City officials also requested businesses to keep thermostats at no lower than 78°F and urged Times Square billboard operators to dim digital displays to conserve electricity.

Forecasters expect the dangerous heat to persist through the July 4 holiday, with millions of Americans likely to face sweltering conditions during travel and outdoor celebrations.