An ice storm that caused power outages in several Berkshire communities Monday and turned many streets into a slushy mess could continue to create problems for commuters Tuesday morning.

According to the National Weather Service in Albany, N.Y., an ice storm warning remains in effect through 7 a.m. this morning. As of late Monday, the weather service was still advising motorists to avoid travel.

Based on power losses, the ice storm's impact was felt most strongly in towns of Otis, Sandisfield and Tyringham.

Officials in Otis declared a state of emergency and opened a shelter to residents, given an extensive loss of power in the community due to icing on lines. As of about 4 p.m., Eversource reported 306 customers in Otis were without power, a tally that had fallen to 202 by 5 p.m. The higher number represented 15 percent of the utility's 2,043 customers in the town.

In the smaller towns of Sandisfield and Tyringham, 16 percent of Eversource's 773 customers remained without power at 5 p.m. In smaller Tyringham, 64 of the utility's 342 customers had lost electricity at the hour, or 18.7 percent.

An emergency operations center opened in Otis Town Hall to provide refuge to residents without heat in their homes. The center is located at 1 North Main Road.

The ice storm's daylong duration meant wires continued to come down through Monday, according to an online Eversource map. On Tyringham Road in West Otis, a cluster of customers lost power at 8:03 a.m. Monday, while just minutes up the road, another group of homes lost service at 3:50 p.m.

Otis customers were affected across the map. One of the biggest losses came at 7:33 a.m., when power blinked off to 29 customers in the Judd and Pinnacle roads area off Route 23 west of the town center.

Otis Town Hall had power as of late afternoon. Residents were invited to charge their phones at the center. A generator stood ready. Otis residents in need of help were urged to call 413-442-0412.

Derek Poirier, the Otis highway superintendent, said late Monday afternoon roads were open and in decent shape. Accumulating ice remained the town's big challenge, he said.

"It's more downed trees and wire damage here," Poirier said by phone from the highway department.

In Great Barrington, trees remained upright and road temperatures kept ice in check, said Sean VanDeusen, director of the town's Department of Public Works.

"Right now we've dodged a bullet," he said. "We're still salting anyway."

He said road crews had been out since 3:30 a.m. Monday and are monitoring temperatures and making sure bridges get more attention since they freeze faster.

VanDeusen had also spoken to town Fire Chief Charles Burger, who told him there hadn't been any accidents. But officials say that motorists should still be vigilant.

"The forecast is still calling for ice," VanDeusen said.

The icy mix made brought traffic to a crawl in many parts of Berkshire County and was believed to be a factor in several accidents. One of those accidents, in Pittsfield, occurred around 12:15 p.m. on West Housatonic Street just below intersection with Hungerford Street. A 2016 Ford Fusion driven by Michael Johnson, 21, of New Lebanon, N.Y., was traveling west on West Housatonic Street when he lost control. His vehicle slid into the eastbound lane and struck the passenger side of a 2006 Chevrolet Aveo driven by Robert Altiery, 25, of Hoosick Falls, N.Y.

Three people taken to hospital for treatment of minor injuries: Jessica Sitterly, 21, of Stephentown, N.Y., who was a passenger in Johnson's car; Jordan Robichaud, 27, of Hoosick Falls and Nathan Cain, 27, of Hoosick Falls, who were passengers in Altiery's car.

The cause of accident was weather and speed, according to the Pittsfield Police Department. Johnson was issued a citation for a marked lanes violation and driving too fast for the conditions.