An extreme heat watch will be in effect from noon Sunday through 8 p.m. Tuesday. Dangerously hot conditions with heat indexes up to 104 degrees are possible.
We know that "summer is hot," but we are expecting several consecutive days with heat indices over 100F; that's a lot of heat stress! Unfortunately, night will provide very little relief as overnight lows only fall to the mid 70s. 🥵☀️
— NWS Wilmington OH (@NWSILN) June 20, 2025
Check on neighbors, elderly, infants, & pets pic.twitter.com/HKVDvbPAxt
McGinnis said a heat wave during this time of year is normal, and he doesn’t expect any record high temperatures. Night temperatures are also expected to rise with a high of 73°F.
Roberto Colon, M.D., chief medical officer at Premier Health, said symptoms of dehydration because of high temperatures come in stages and that awareness is important to stay safe in extreme heat.
Sweating is one of the early signs, but as dehydration gets more significant, muscle aches, upset stomach, fatigue and/or nausea may begin to set in. Colon said dehydration past this point can make it feel hard to move around or cause confusion, which can ultimately lead to seizures, coma or death without hydrating.
Colon recommends drinks like “Gatorade, Pedialyte or any of those solutions that have additional electrolytes,” as just drinking water isn’t recommended to stay properly hydrated.
With the annual Dayton Air Show in Vandalia this weekend, Colon urges participants to wear loose clothing and avoid dark-colored clothes, while seeking shaded areas to avoid direct sunlight.
“One thing we don’t want to forget is sun safety,” Colon said. “If you’re going to be out in any sun exposure areas, make sure that you’re using sun protection. Sunburns can actually accelerate the dehydration process further.”
Cooling centers are available across Montgomery County next week for anyone who needs them to stay safe and cool for no charge.
Washington Township is providing one location with charging stations open Monday–Friday, 6 a.m.–8 p.m.; Saturday, 8 a.m.–5 p.m.; Sunday, 10 a.m.–5 p.m.:
- Washington Township Recreation Center – 895 Miamisburg-Centerville Road
The City of Dayton is providing three locations open Monday–Friday, 6 a.m.–9 p.m.; Saturday, 9 a.m.–4 p.m.:
- Greater Dayton Recreation Center – 2021 West Third Street
- Lohrey Recreation Center – 2366 Glenarm Avenue
- Northwest Recreation Center – 1600 Princeton Drive
The City of Moraine is providing one location open Monday–Friday, 7 a.m.–7 p.m.; Saturday, 9 a.m.–1 p.m. (regular business hours):
- Payne Recreation Center – 3800 Main Street
The City of Vandalia is providing one location open Monday–Friday, 6 a.m.–9 p.m.; Saturday, 12 p.m.–6 p.m.:
- Vandalia Recreation Center - 111 Stonequarry Rd.
Greene County also has the following locations serving as cooling centers:
- Beavercreek Community Library: 3618 Dayton-Xenia Road
- Beavercreek Senior Center: 3868 Dayton-Xenia Road
- Cedarville Community Library: 20 S. Miller St.
- Fairborn Community Library: 1 E. Main St.
- Fairborn Police Department lobby: 70 W. Hebble Ave.
- Fairborn Senior Center: 325 N. Third St.
- Jamestown Community Library: 86 Seaman Drive
- John Bryan Community Center: 100 Dayton St., Yellow Springs
- Spring Valley Senior Center: 2551 Old U.S. 42 South
- Winters-Bellbrook Community Center: 57 W. Franklin St., Bellbrook
- Xenia Community Library: 76 E. Market St.
- Yellow Springs Community Library: 415 Xenia Ave.
- Yellow Spring Senior Center: 227 Xenia Ave.
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