Columbus, Ohio – A dangerous wave of extreme heat will blanket much of Ohio on Thursday, with heat index values soaring well above 100 degrees and prompting urgent safety warnings for millions across the state.
According to the National Weather Service in Wilmington, the heat index is expected to peak between 100°F and 105°F from Thursday morning through 8 p.m., impacting cities including Columbus, Cincinnati, Dayton, and Richmond. The agency warns that the dangerous combination of heat and humidity could make outdoor activities risky, especially for vulnerable groups such as seniors and children.
Counties from Montgomery to Hamilton and as far north as Sidney and Celina could see some of the highest apparent temperatures, reaching up to 105°F in spots like Cincinnati, Brookville, and Carrollton. Local agencies urge residents to avoid strenuous activity outdoors, stay hydrated, and check on neighbors. Schools and summer camps may adjust schedules, while utility companies are bracing for potential power surges as air conditioning use spikes.
Relief is expected to begin Friday afternoon, when scattered storms could bring brief cooling. However, above-normal temperatures are likely to persist into the weekend.
Residents are encouraged to monitor updates from the National Weather Service, as additional advisories may be issued if conditions worsen.
