The department warned about the dangers of carbon monoxide poisoning from trying to stay warm in a car with exhaust pipes blocked by snow.

CNN: STORY HIGHLIGHTS

An 11-year-old boy died of carbon monoxide poisoning after being overcome as he sat in a running car to keep warm, while his father was shoveling snow to get the car out of a snow bank in Boston's Dorchester neighborhood.

WSJ: A state-by-state look at the Northeast snowstorm

He was helping his father shovel snow and took a break to warm up in a car.

WSJ: Northeast Digging Out After Snowstorm

The boy hopped in the snowed-in family car to warm up, but the engine was running and the exhaust pipe was blocked by snow, causing carbon monoxide to accumulate in the car.

CNN: STORY HIGHLIGHTS

Stay in your car and keep warm by running the engine as much as you can.

BBC: UK snow and ice continue to disrupt travel

At least five deaths in the U.S. were blamed on the snowstorm, including an 11-year-old boy in Boston who was overcome by carbon monoxide as he sat in a running car to keep warm while his father shoveled Saturday morning.

WSJ: Northeast trying to get back on track after storm

At least four deaths in the U.S. were blamed on the overnight snowstorm, including an 11-year-old boy in Boston who was overcome by carbon monoxide as he sat in a running car to keep warm while his father shoveled Saturday morning.

NPR: The Big Dig-Out: New England, NY Slammed With Snow

"Ralf has come closer to the optimum of the car a bit quicker than Juan, and though Juan made a big improvement today between the warm-up and qualifying, he was always a little bit behind, " he said.

BBC: Younger Schumacher moves up a gear