SLIDESHOW: Cars Slide Out Of Control WATCH IT: Ice Coats Roads In South Everett

WATCH IT: Icy Roads Strand Cars In Kent, SeaTac

Hail turned a hill on 42nd Avenue South in Kent into a sheet of ice and stranded several drivers at about 9 p.m. on Wednesday night.

"The road got coated rather quickly and all of a sudden we started hearing these little thuds," said Louie Gong.

Those little thuds were cars smashing into each other. One slid into Gong's car.

"It's very scary to watch people, helpless to stop their cars," Gong said. "Cars parked with emergency breaks on in the middle of the road were still sliding. I was supposed to go to work today, but I'm totally stuck, as you can see, so my goal is to make the best of a bad situation and relax."

Some drivers put rocks under their tires to keep their vehicles from sliding further down the road.

In SeaTac, a man told KIRO 7 crews he was upset over a "road closed" sign on 35th Avenue South that wasn't put up until 4 a.m. on Thursday when the man himself put the sign in the road.

Earlier, around midnight, Cliff Evans' wife had gotten stuck on the hill while driving home from work. The couple paid a two company $150 to pull the car to safety.

"I'm just kind of taken back by the fact that the city failed us in this area," Evans said. "If my wife went down there and got in an accident -- a fatality -- we'd be looking at something totally different."

The icy roads caused a snow plow and three cars to get tangled up overnight in Kent on South 272nd Street and 45th Place South.

State troopers said there were some minor injuries in the crash, but everyone is expected to be OK.

Since the crash, parts of eastbound 272nd have been closed by police Thursday morning after numerous cars spun out on the ice-covered hill on the border of Kent and Federal Way.

KIRO 7 Eyewitness News reporter Michelle MIllman said more than two dozen cars have been abandoned in the middle of the road, unable to navigate the dangerously slick streets.

Some drivers of those vehicles have put rocks under their tires in an effort to keep their cars from sliding down the hill.

A state trooper and a driver are recovering from injuries after a crash on state Route 167.

Police said the trooper was on his way to another crash, when a car beside him lost control and spun out.

Investigators said the trooper's car T-boned another car.

That driver was taken to the hospital with serious injuries. The trooper suffered minor injuries.

Trooper Julie Startup said even if the roads appear to be OK, people should drive with caution.

“Unfortunately, when the ice comes, it’s not consistent. It’s here in places, gone in others. And people will see other vehicles traveling along fine and they start picking up their speed growing l more confident,” said Startup.

Startup said another trooper got into a minor accident while responding to the crash. There were no injuries in that crash.

In Skagit County, a massive hail storm was followed by a train crashing into a semi-truck.

The crash happened in Mount Vernon, at about 7 p.m. Wednesday.

Witnesses said traffic was at a stop when the truck lost traction on the icy train tracks. The truck’s wheels were spinning when a train came barreling in.

“I could hear the train coming and the train driver just laid on the horn the whole way, and the truck driver couldn’t do anything to get out of the way,” said witness Stu Skelton.

The trailer was loaded with boards and building materials that spilled over the roadway.

Traffic was at a standstill for hours after the accident.

The driver of the tractor-trailer was not hurt.

In Auburn, a multiple car and tractor-trailer crash occurred on Highway 18 in Auburn just before midnight Wednesday at Southeast 304th Street. There were no reports of injuries.

In Snohomish County, icy conditions were major concern Thursday morning, after a snow and hail storm Wednesday.

Some people said the snow was the size of quarters at one point.

Colin Rowe's car is now in the body shop after another car slid off Highway 525 and crashed into it.

“I hit the brakes and I just slid, so there wasn’t much I could do,” said Rowe.

“You cannot drive the speed limit on an ice- or snow-covered roadway,” said Trooper Keith Leary, reminding drivers to slow down.

Police said icy roads could be to blame for a deadly crash in Mason County.

A woman died Wednesday evening when her car crossed the center line on Highway 101, just north of Shelton and crashed into another car, police said.

A family of four was in the car that was hit, and all of them were sent to the hospital, but have since been released.

There no is word yet on what caused the crash, but slick conditions were believed to be a factor, officers said.

KIRO 7 traffic reporter Autumn Wells reported numerous other crashes throughout the Puget Sound area.

Multiple cars spun out or crashed on Interstate 405 at Southcenter. Officers closed the onramp to I-405 from SR 518.

Patrick Conrad with the state DOT said the biggest problem areas were in Snohomish County and north King County.

Crews are applying sand and de-icer and on Wednesday night applied anti-icer.

You can stay updated on traffic with the following resources:

Mountain Pass ReportsKIRO 7's Traffic Page Traffic alerts on Twitter and Facebook