St. Louis, Missouri – Dangerous heat is expected to grip a broad section of the nation’s midsection through the Independence Day holiday, with millions from Nebraska to Texas and east to Alabama facing prolonged periods of oppressive temperatures and little overnight relief. Heat index values of 100 to 110 degrees are expected across much of the region through the Fourth of July, while a renewed round of dangerous heat is forecast to develop again early next week.
According to the National Weather Service Weather Prediction Center, widespread Major to Extreme HeatRisk will persist across the Lower Great Lakes, the Mississippi Valley, the Ohio Valley and much of the central and southern United States through the holiday weekend. Forecast guidance also shows elevated heat concerns continuing from Monday through Friday, July 6-10, with moderate to extreme heat risks extending across portions of the Plains, Mississippi Valley and Southeast.
The greatest impacts are expected across Illinois, Missouri, Iowa, Kansas, Nebraska, Oklahoma, Texas, Arkansas, Louisiana, Mississippi, Tennessee and Alabama. Major metropolitan areas including Chicago, St. Louis, Kansas City, Omaha, Oklahoma City, Dallas, Little Rock, Memphis, Birmingham and New Orleans could experience multiple consecutive days with dangerous afternoon heat and warm nights that remain in the 70s.
The lack of overnight cooling significantly increases health risks, particularly for older adults, children, outdoor workers and anyone without dependable air conditioning. Utilities across the region may also experience increased electricity demand as residents rely heavily on cooling systems during the extended heat wave.
Anyone planning Fourth of July cookouts, fireworks displays or travel should schedule outdoor activities during the early morning or late evening whenever possible. Stay hydrated throughout the day, take frequent breaks in air-conditioned locations and never leave children or pets inside parked vehicles.
Forecast confidence remains high that hazardous heat will continue through the holiday weekend before another period of elevated HeatRisk develops beginning Monday. Additional heat advisories, excessive heat watches and warnings are likely across portions of the central United States as the event continues into next week.
