Tornado watches spanning from Louisiana to Michigan and tornado warnings in southern portions of Illinois and Missouri were issued by the National Weather Service on Thursday.
A huge line of storms is moving through the U.S., bringing intense lightning strikes and heavy rain. The storms are also moving into Ontario, but on a smaller scale.
Parts of the Chicago area experienced flash floods on Thursday as rain forced the Des Plains River to exceed its banks.
On Wednesday, heavy rain and wind gusts topping 100 km/h tore through parts of Missouri and Illinois.
At least one tractor trailer was blown over by the wind.
If you should come into contact with a tornado:
Visit the U.S. Cities Index to keep on top of weather conditions south of the border.
With files from WGEM/WBBM