CHICAGO — Rain and rapidly rising temperatures accompanied by thick fog threatened to cause flooding Saturday in the Midwest after days of Arctic cold, heavy snow and ice.
Thick ice on roads that contributed to dozens of deaths had thawed and mountains of snow turned into pools and streams of water.
"It's a Catch 22," said Marisa Kollias, spokeswoman for the Illinois Department of Transportation. "We're getting rid of one problem, the ice, but we're getting another problem with the flooding."
The National Weather Service posted flood watches and warnings Saturday for parts of Illinois, Iowa, Wisconsin, Indiana, Michigan and Missouri. As much as 2 inches of rain fell in two hours during the night in west-central Illinois, the National Weather Service reported Saturday.
And as warm air collided with cold, the weather service posted tornado watches for parts of Texas, Oklahoma, Arkansas, Missouri, Illinois and Kansas. High winds left 42,000 people in western Missouri without electricity; power had been restored to most by Saturday evening.
After subzero temperatures in places earlier in the week, Saturday morning readings were in the 40s as far north as Cheboygan, Mich., at the top of the state's Lower Peninsula, the weather service said. However, up to 7 inches of snow is possible in the state Sunday, the agency said.
The weather service said the Chariton River was overflowing and causing minor flooding in Chariton, Iowa. Flood stage is 15 feet; the river was at 16.6 feet at 3 a.m. Saturday and expected to rise a bit more. It said road flooding was reported in parts of Missouri.
By late Saturday, the rain had stopped and an ice storm swept across much of Iowa. Interstate 80 near Grinnell was closed for a while because of traffic accidents.
Around Chicago, Cook County authorities offered sandbags to communities that needed to fortify low-lying areas, county spokesman Sean Howard said.