Over the past two winters, 28 people have fallen through the ice on Hennepin County waterways.
Twenty-five survived, largely because of quick action by the Hennepin County Sheriff's Office Water Patrol unit.
Last week, deputies and special deputies demonstrated their lifesaving techniques on Lake Minnetonka, with Sheriff Rich Stanek warning residents not to be fooled by the early blast of freezing weather.
"Everybody is on thin ice this time of year," Stanek said. "We will do what is necessary to save lives. … Every [ice emergency] is preventable if you are aware. You always have to be aware of your surroundings."
Stanek said most rescues involve experienced snowmobilers and anglers who didn't realize they were in peril. He and his staff ran through guidelines to lessen the chances of falling through:
• Ice needs to be at least 4 inches thick to walk on.
• Ice must be a minimum of 5 inches thick to support a snowmobile.
• Ice needs to be at least 12 to 15 inches thick to support icehouses and vehicles.