That is one of the nicer things about living in the non-forest area of Minn. such spreading fires are rare; although about fifteen years ago, with the rich yuppies building houses north of the Twin Cities in the scrub brush and trees area, one dude, in a very dry year, decided to burn his scrap pile.
He found out the hard way that that brush and scrub trees, when dry, burn like kindling to the cost of a few million in expensive yuppie homes.