Lake County experienced localized flooding that closed several intersections, including at routes 45 and 137 and at routes 41 and 176. Cars became trapped in water at those intersections, but nobody was injured, officials said.
In Cook County, both the northbound and southbound lanes of Dee Road were closed from Golf Road for a time.
In Addison, lightening struck the roof of a home just before 7 p.m., catching the attic and upper level of the home in the 1400 block of West Byron Avenue on fire. Fire officials say it caused $100,000 in damage.
Meteorologists predicted that rainfall rates could reach between 1 and 2 inches per hour with the runoff, especially in low-lying and urban areas, creating flash flooding.
In Libertyville, 1.77 inches fell in 75 minutes at Route 21 and Winchester Road. In McHenry, 1.17 inches fell in 30 minutes. By 9 p.m. in Elgin, 1.93 inches of rain had fallen. Areas throughout Kane and Cook counties also reported hail.
A flash flood watch was in effect until 1 a.m. in areas including northeastern Kane, northern DuPage, northwestern Cook, southeastern McHenry, and southern Lake county.
Scattered thunderstorms were expected to continue throughout the night with storms that could bring gusts of wind over 60 mph, hail up to the size of golf balls, torrential downpours and frequent cloud to ground lightning strikes.
Accuweather.com forecasts that temperatures will drop once the storms pass, with highs on Tuesday reaching the mid 60s and highs in the 50s through Friday.