Tuesday icy roads caused a massive 30 to 40 car pileup in Wisconsin as Winter Storm Jupiter's frigid impacts persisted in the Midwest. After days of ice, the Plains were still struggling with the effects of the storm.

During its trek eastward, the storm has killed at least seven, spreading frozen precipitation that created dangerous road conditions from the Texas Panhandle through the Plains and all the way up to Michigan.

(MORE: Check the Forecast for Winter Storm Jupiter)

Multiple states declared emergencies ahead of the storm, and accidents – some fatal – were reported across the region.

Michigan

Icy conditions temporarily closed all runways at Gerald R. Ford International Airport in Grand Rapids Monday morning, according to the Associated Press. It took about an hour to treat the runways before they were considered safe to reopen, airport spokeswoman Tara Hernandez told the AP.

As roads got more dangerous, several school districts sent students home early Monday or canceled evening activities, the report added.

Wisconsin

Tuesday a driver was sent to a hospital with minor injuries after icy roads led to a pileup involving an estimated 30 to 40 vehicles, the Star Tribune reports. The Dane County Sheriff's Office began receiving calls around 4:30 a.m. when drivers were unable to navigate an icy hill and curve on Highway G.

Cars began striking the guard rail and many ended up in a cornfield, the Tribune also reports. As morning traffic picked up, more cars began to get stuck. Salt and tow trucks were called in to clear the road. 

Dane County Sheriff's Office spokeswoman Elise Schaffer told Madison.com that deputies were called out to 70 incidents Monday night due to terrible road conditions.  

"We had 80 vehicles, seven semi-trailers, including three jackknifed trucks, three salter trucks, two tow trucks and two squad cars in slide-offs," said Schaffer. 

The conditions caused dozens of school districts to delay or cancel classes Tuesday, according to the AP. Widespread ice-covered roads were reported Tuesday from northern Wisconsin to La Crosse and east to Sheboygan, while several jackknifed semis forced authorities to close a stretch of Highway 26, the AP added.

Officials said Monday morning's round of freezing rain led to multiple slide-offs and collisions, according to the Wisconsin State Journal. The accidents because so numerous that police in Madison said they would only respond to injury crashes, the report added.

(MORE: Where Freezing Rain Accumulations Are Most Common in the U.S.)

Chris Kelley, street superintendent for the city of Madison, told the Wisconsin State Journal that drivers should expect rough travel to continue.

"Ugly, icy conditions persist," Kelley said Monday afternoon. "All roadway users should anticipate a challenging evening commute, that will require everyone to make good choices."

Illinois 

Freezing rain was reported in the Quad Cites area Monday morning, where at least 10 cars were involved in a pileup before dawn on Interstate 88. According to WQAD.com, some vehicles ran off the road, some were getting towed and others were able to drive away from the wreck. 

Energy provider Ameren said only a handful of customers were without power in southern Illinois, where heavy ice accumulated on trees in Jackson and Williamson counties.

In the Chicago area, untreated roads and sidewalks became icy on Monday, which caused some travel problems, WLS-TV reported.

"We're walking in the street because we can't walk on the sidewalk because of black ice," Waukegan resident Edward Lewis told WLS-TV. "You'll slip and fall, break your hip or leg."

Iowa

Ice took down power lines in Cedar Rapids and created treacherous traveling conditions on highways in the eastern part of the state.

Alliant Energy reported that close to 2,000 customers were without power in Cedar Rapids at one point Monday, but those outages had been mostly restored by Monday afternoon.

Iowa state troopers reported that a Department of Transportation snow plow slid off an icy highway in the northeastern corner of the state.

Nebraska

Omaha remained in Jupiter's grip Monday as ice downed power lines and kept roads slick. Omaha Metro Transit canceled all bus service, and around 1,500 customers in the Omaha metro lost power midday Monday, according to electric provider OPPD.

Omaha Public Schools canceled all classes on Tuesday, as did the University of Nebraska at Lincoln, but the university was only closed to students, KETV.com reported; staff was still expected to report. 

The ice-covered roads caused major problems Sunday, especially in southern Nebraska. South of Odessa, a weather-related crash involving two semi trucks closed both directions of Interstate 80 Sunday morning, according to the National Weather Service. Images from the scene showed at least one tractor-trailer engulfed in flames, but the Nebraska State Patrol told the AP that there were no injuries.

As the ice storm drew closer to Lincoln and Omaha, residents stocked up on supplies, according to Omaha.com. Officials urged everyone to stay off the cities' roads once the storm's icy side arrived, and were hopeful that the holiday weekend would help keep more people at home.

"If there has to be a good time for this storm, it helps that this is a holiday weekend," Omaha mayor Jean Stothert told Omaha.com.

National Weather Service meteorologist Cathy Zapotocny told the Lincoln Journal-Star that an ice storm of this magnitude hasn't hit Nebraska in 11 years.

Kansas

At least 5,000 customers remained without power Monday afternoon in the Dodge City area, the Victory Electric Cooperative reported. It could be several days before the outages are restored, the AP said.

A shelter was opened Monday at the Dodge City Community College, the report added.

The Kansas Highway Patrol reported two deaths in separate crashes on dangerous Kansas roads Saturday.

At about 5:40 p.m. Saturday evening, a vehicle skidded off the road at the intersection of KS-383 and KS-60 near Almena, according to a Kansas Highway Patrol report. The vehicle struck a bank and rolled, killing 19-year-old Takoda Turner, a passenger in the vehicle. The driver, 20-year-old Tyson Smith, suffered non-life-threatening injuries.

About three hours later, a vehicle skidded off U54 west of Liberal, flipping multiple times after it went off the road. There were six people inside the car at the time of the crash, including 35-year-old Thay Torres-Ocacio, who was pronounced dead at the scene. Three other passengers were injured, including the driver, according to the police report.

Oklahoma

The winter storm has been blamed for 65 injuries, most of which were falls, across the Sooner State, Oklahoma emergency management officials said. Of those 65 injuries, nine occurred in traffic wrecks, the Oklahoma Department of Emergency Management told the AP.

Oklahoma Highway Patrol officials confirmed to News9 that a fatal accident on Interstate 40 west of Weatherford killed one person on Saturday.

KOTV said a pickup truck lost control on an icy highway and slid into an apartment complex Saturday morning in Tulsa at 7:30 a.m. local time. The local news outlet reported that the pickup crashed through a chain-link fence, smashed into a brick retaining wall and crashed into the side of a building at an apartment complex that was being used for storage.

Tens of thousands of Oklahoma homes and businesses lost power during Jupiter, the AP also said.

Missouri

Four deaths have been blamed on Jupiter in Missouri. Officials said Amanda Hrenya, 32, died Monday from injuries suffered in a single-car crash Friday night along Interstate 70 in Independence, the Kansas City Star reported. Hrenya lost control of her vehicle, which went off the highway and collided with a rock bluff, the report added.

Michael Ogle, 22, died Saturday after losing control of his vehicle on an ice-covered road in Ravenwood, StJoeChannel.com reports. His vehicle reportedly slid off the road and struck a fence around 4:30 a.m. The car overturned three or four times before Ogle was ejected out of the driver's side window, officials said. He was not wearing a seatbelt at the time of the incident and was pronounced dead at the scene.

Maung Hnin, 35, was killed early Saturday morning when he was ejected from a vehicle in a large pileup in the southbound lane of Interstate 29. Missouri State Highway Patrol reported that the 2008 Ford Econoline was traveling in the left lane before veering off of the road and overturning, ejecting Hnin. The incident report states that Hnin was then struck by an unidentified vehicle and was pronounced dead at the scene shortly thereafter by deputies from the Platte County Sheriff's Office.

Highway patrol officials would not comment on if the accident was weather-related, but several other vehicles were involved in the incident and as many as six people reported injuries ranging from minor to moderate.

(MORE: What Ice Storm Accumulations Mean and How to Stay Safe)

A Missouri woman who died in a fatal accident that occurred on northbound I-55 Friday morning was identified as 33-year-old Tiffany Jackson of Crystal City, Missouri, KMOV.com reported. A Missouri Highway Patrol spokesperson told KMOX-TV that Jackson was driving too fast for conditions when she lost control of her vehicle on an ice-covered railroad bridge and slid into a tree. She was not wearing a seatbelt.

The Missouri Department of Transportation said roads in the area were partially covered at the time the vehicle slid off the road and into a tree. The Highway Patrol said it responded to about 100 crashes Friday.

According to NBC News, about 30,000 homes and businesses were without power at the height of the storm.

Western Snow

Areas of the West were buried under feet of snow, up to 10 feet in some places in the Sierra Nevada. The sheer mass of snow caused damage to several other buildings in Bend, including a gymnasium roof at an elementary school. The school district said on its website that nobody was in the gym when the roof fell at Highland Magnet at Kenton School in Bend.

Three visitors were rescued after snowstorms forced them to take refuge in a heated restroom at Crater Lake National Park. Park officials told the AP a rotary snow plow cleared a path on the three-mile road from park headquarters to Rim Village to reach the visitors Wednesday. Officials say none of them sustained major injuries.

Heavy snow closed a nearly 250-mile stretch of Interstate 80 in Wyoming Wednesday and Thursday due to dangerous driving conditions. The Colorado Department of Transportation briefly closed Interstate 70 westbound at mile marker 215 due to an avalanche that cut off the road west of the Eisenhower Tunnel. According to the DOT, no cars were caught in the slide.