br pHeavy flooding created sinkholes and destroyed several roadsa, including this one behind a shopping center in Houghton, Michigan, on Sunday, June 17.ppMore than 60 sinkholes were reporteda on June 17, and over three dozen roads were completely washed out and unusable at the time of reporting. The National Weather Service saida law enforcement in Houghton County reported “historic flood damage” from the four to eight inches of rain.