Just past Prior Lake, the earth was on fire.
Flames burrowed into the dry, peaty soil of Springfield Township and smoldered for days, as fire crews hacked and dug, trying to stop the flames before they threatened lives and property.
Peat has been a source of warmth and fuel for thousands of years. But usually it has to be cut out of the earth and dried before it can burn. Minnesota's summer drought had turned the ground beneath our feet to kindling.
The Minnesota Department of Natural Resources estimates that 98% of the wildfires in this state are started by humans. A cigarette flicked out a car window. A pile of burning yard waste left unattended.
Small wildfires burned outside Prior Lake and Arlington in the Twin Cities metro this week. One was sparked by burning debris. The other fire's cause has not been determined, but the odds are that one of us started it.
The temperatures are dropping. October is turning cold and clammy. As tempting as it might be to light an autumn bonfire, state fire officials are hoping you will not.
"Because of how dry things were, the peat moss in these wetlands, the roots and things, were burning literally underground," said Prior Lake City Manager Jason Wedel. Fire crews battled the subterranean blaze with thermal imaging, digging toward hotspots before they could spread.
On Wednesday, the National Weather Service issued a red flag warning for large swaths of southwestern Minnesota, as high winds whipped across tinder-dry farmland and prairie.