The science behind the smoke: What’s driving wildfires that are sending thick smoke to Wisconsin

The smoke blanketing Wisconsin Thursday wasn’t subtle. You could see it, smell it and sometimes feel it while breathing. It was the product of wildfires burning in northern Minnesota and Ontario. Dr. Mayra Oyola, an atmospheric scientist at UW-Madison, said dry and windy conditions are fueling those fires. Typically, rain is helpful to fight fires, but Oyola said storms can pose a new challenge: lightning. Lightning strikes can ignite more fires.