Two Michigan sisters, 8 and 10, survived a cold night huddled together in wet clothes Sunday after their father’s car crashed into a Michigan lake.

The crash happened around 2 a.m. Sunday at Lake Macatawa, just over 30 miles from Grand Rapids, according to MLive.com.

After the girls spent about seven hours on a nearby porch huddled together for warmth, they knocked on one man’s door.

They were treated for cold exposure and released from the hospital, police said in a news release.

About 12 hours after the car went into the water,  authorities found the vehicle completely submerged in the lake. Inside was the body of the girls’ father, 52-year-old Jon Dowler, police said.

Police also told the Holland Sentinel they believe the crash was an accident and speed may have been a factor.

“At this point, we believe that the father became disoriented, not familiar with the area, which ended up (with) him ending up in the water just because of the way that road is constructed there,” Ottawa County Sheriff’s Office Lt. Eric Westveer told the newspaper.

Seeking help after the accident

Kevin MacLeod was at home with his wife around 9 a.m. Sunday when they heard a knock at the door.

The couple lives in a neighborhood with more than a few vacated houses, and most of the nearby homes are empty cottages or summer homes, according to the Holland Sentinel.

“I go out through my front porch and I just see a little girl’s face,” MacLeod told USA TODAY.

He opened the front porch door and saw a little girl standing there, shivering in a wet coat with one shoe on and one bare foot.