National Weather Service United States Department of Commerce

Heat Wave and Severe Thunderstorms this Independence Day

A prolonged, dangerous heat wave will persist through the Independence Day weekend across the Ohio Valley, Midwest, and Mid-Atlantic. Numerous temperature records are expected. Clusters of severe thunderstorms will move across parts of the Allegheny Plateau into Mid Atlantic this Independence Day, with potential for widespread damaging winds. Additional severe thunderstorms in the Great Plains. Read More >

Oppressively hot and humid conditions linger through the holiday weekend.
Know the signs of heat illness as dangerously hot and humid conditions linger through the holiday weekend.
Children, the elderly, and those with chronic illness are especially vulnerable to heat exposure. NEVER leave anyone (or pets) alone in a locked car. Monitor people exercising or playing sports, ensuring frequent breaks. Bring water to outdoor activities with others to keep everyone hydrated. Learn the signs of heat-related illnesses at weather.gov/safety/heat-illness
Heat waves have the potential to cover a large area, exposing a high number of people to a hazardous combination of heat and humidity, which can be very taxing on the body. Learn how to stay safe during a heat wave at weather.gov/heat