VINCENNES, Ind. (We Are Knox County) - Frozen ponds, lakes, and waterways can look solid—but they can be dangerously unpredictable, officials warn. Firefighters with the Vincennes Township Fire Department have been taking advantage of the cold to train for ice rescues. “Ice is never 100% safe,” Vincennes Township Fire Chief Tim Smith told WAKC News Now. So far this year, the department has not responded to any rescues involving people or pets that have fallen through the ice.