Hurricane-force winds were also reported in parts of the area. Wind gusts topped out at 81 mph in Valparaiso, Indiana, 75 mph in Lakes of the Four Seasons in Indiana, and 74 mph in Gary, Indiana, and Lynwood, Illinois.

The meteorologist warns that although the morning's rain is significant, it is merely a prelude to potentially severe weather expected in the afternoon. The Storm Prediction Center has designated a Level 3 risk for the majority of the Chicago area, indicating an enhanced threat for severe weather.

NBC 5 Storm Team, the first round of severe weather could occur early Wednesday morning, and a second, more powerful round could develop late Wednesday morning

A semi driver was killed in Valparaiso as strong winds moved through the area, knocking out power for thousands, officials said. The storms uprooted trees, downed power lines, and damaged several homes,

Chicagoans can expect to see more severe weather on Wednesday, with the weather for Monday into Tuesday night remaining calm.

Stronger storms are possible Tuesday night, and more rounds of showers and storms move into the area Wednesday.

As nearly 30,000 people remain without power due to storms, more severe weather chances were on the way for Illinois and Indiana.