Last week's rain flooded many of these homes and closed the roads nearby.
Nevertheless, the most significant flooding so far has been in southwest MI, northwest in, and northeast IL, where heavy rain fell on a snowpack that completely melted, releasing meltwater equivalent to another 25mm of rain.
"This will contribute to a significant risk of flash flooding", the service said in a warning.
Sgt. Shena Kohler of the Emergency Management Bureau of the Rock County Sheriff's Office said the Rock River at Lake Koshkonong is forecasted to reach minor flooding levels by Monday.
The Short Creek and North Fork areas of Ohio County were hit especially hard by flash flooding.
We've had an extremely wet February with many places a good 5-6 inches above average as far as rainfall is concerned.
Minor erosion-base flood damage to low-lying areas and agricultural land in Janesville and Afton is anticipated, according to the alert.More news: Rashid Khan becomes youngest bowler to become no. 1 in ODI rankings
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The majority of the rain should wind down into the afternoon with mainly cloudy skies late.
We've also been talking about the Major Flooding happening with the Ohio River which ends up dumping into the Mississippi River, so as that water continues flowing south we'll see the Mississippi River rise also. Emergency teams were out installing more flood gates over the weekend.
TODAY: Occasional Rain, heaviest south.
"It's going to take a while to crest", Mazza said.
Over the past several days, Grand Rapids residents have experienced what the city is calling near historic flooding.
She's lived on River Road for 30 years and said having a great view of the Ohio River and the rest of the city comes with a catch.
The Ohio River floods downtown Aurora, Indiana, on Sunday Feb. 25, 2018.