Dream of A Storm In Great Lakes Area

Just had this dream last night,
A map of North America with little curved red lines in the Great Lakes area, between Canada & the US, and something about a storm or some other big natural event. I briefly thought maybe it meant an earthquake, but I think there aren't any tectonic plates in that region? Anyway, the area is Ohio, Toronto, Michigan, Pennsylvania, a bit of Upstate NY--that's where the red lines were, in that breadbasket. Maybe a huge snowstorm?

There have been tremors in Michigan before. The crack in the wall of my old bedroom in the Detroit area attests to that.