There have been 20 preliminary tornado reports with four of those in central Indiana.
They knocked over semi-trailers with 100-mile-per-hour winds.
There were several other reports of tornadoes in Illinois, Indiana, Texas, Missouri, North Dakota and Iowa.
A flood warning is also in effect for several Illinois counties Monday morning.
You can find the forecast for Chicago here.
Get the latest weather info with our ABC7 Chicago AccuWeather app.