Heavy rain during thunderstorms Thursday morning made for a difficult morning commute in Northwest Indiana and Chicago's suburbs.
The National Weather Service warned the storms had the potential of producing more than an inch of rain an hour along with isolated winds of more than 40 mph.
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Commuters could encounter ponding on roads.
Drivers should turn around instead of driving through flooded roads, the weather service said. Small creeks, streams, urban areas, highways, streets and underpasses, and other low-lying areas could experience flooding.
More isolated storms are possible in the afternoon and into tonight, and areas south of Interstate 80 could see heat index readings near 105 degrees.
Check back at nwi.com for updates to this story.
Tips for practicing safety during severe weather
Planning and preparation during severe weather outbreaks can help keep Hoosiers safe and minimize property damage. The Indiana Department of Homeland Security is encouraging Hoosiers to practice their weather safety action plans, which can help keep families safe in the event of severe weather.
To find out more about preparing for severe weather, go to GetPrepared.IN.gov.