Afternoon high temperatures are expected to climb today into the upper 80s or around 90 across much of northeast Indiana and northwest Ohio, including Allen County, the National Weather Service said.
Increasing humidity will allow heat index readings to climb into the 95- to 100-degree range, the weather service said. The highest readings are expected southwest of a line from New Buffalo, Michigan, to Rochester, Indiana.
An isolated strong to locally severe thunderstorm capable of gusty winds cannot be ruled out, the weather service said, especially northwest of a line from Monticello, Indiana, to Warsaw to Sturgis, Michigan.
The weather service said those working outdoors today should take frequent rest breaks and stay hydrated.