Emergency crews and tow truck drivers had pulled five vehicles from the frigid waters of Lake St. Clair by 5:45 p.m. Saturday and were working on a sixth.
Bill Yost, Ira Township assistant fire chief, said the first call about a vehicle that had broken though the ice was at 3:18 p.m. More calls came in rapid succession.
All the vehicles were at the Michigan Department of Natural Resources boat launch on M-29 west of Palms Road.
"When we got out here we had multiples (through the ice)," Yost said.
There were no injuries.
Clay Township Fire Department and Clay police also responded.
Yost said temperatures Sunday are expected to be even warmer than they were Saturday. The National Weather Service forecast is for rain with a high near 46.
He said drivers exacerbate the situation by parking next to each other.
"Unfortunately, when they pull out there, they think it's a Meijer parking lot," he said.
He said what appears to be good ice in the morning can become rotten by afternoon.
"The biggest thing is there is no such thing as safe ice," Yost said. "With the weather conditions this year and the lack of steady cold ... ice conditions can deteriorate quickly."
Contact Bob Gross at (810) 989-6263 or firstname.lastname@example.org. Follow him on Twitter @RobertGross477.