Dangerous and potentially record-setting heat wave to scorch millions this July Fourth

Key Points:

• A severe heat wave is forecast to impact over 100 million Americans across the eastern US, peaking around the Fourth of July holiday, with temperatures near or above 100°F and heat indices exceeding 110°F in many areas.
• The heat wave is notable for persistent high temperatures both day and night, with over 250 record warm overnight lows potentially being broken, posing serious health risks including heat exhaustion and heat stroke.
• Major cities such as Washington, DC, New York City, Richmond, and Raleigh are expected to experience record-breaking daytime highs and unusually warm nights, exacerbating the risk of heat-related illnesses.
• Public officials in affected areas are preparing for the heat wave during the busy Independence Day celebrations, emphasizing hydration, limiting outdoor activities during peak heat, and providing resources such as cooling centers and outreach to vulnerable populations.
• The heat wave is linked to climate change and is part of a global trend of more frequent and intense heat events; relief is expected later in the holiday weekend for parts of the Midwest and Northeast, but above-average temperatures will continue in the South into the following week.