MOUNT WASHINGTON (AP) – A Canadian hiker was being treated for severe hypothermia after he and three others who were dressed for summer got caught in winter weather on Mount Washington.

Fish and Game Lt. Todd Bogardus says four hikers from Quebec began hiking up the toughest trail on the mountain late in the day on Wednesday and got caught in high winds and snow. The injured hiker collapsed from the cold. His companions brought him to the Auto Road and one person hiked to the summit, where he found a vehicle with the keys in it. He drove back to his companions, and for some reason, drove them back to the summit instead of to the base, Bogardus said.

Finding no one, they broke into an Auto Road building and called for help. State park employees elsewhere on the summit brought them to the base. The hiker was in serious condition.

Their names were not available.