Storm chasers gather on a gravel road near Winnebago, Minn., as storm clouds erupt in southern Minnesota on April 13. Create an account or log in to save stories. Thanks for liking this story! We have added it to a list of your favorite stories. Typically during the summer, hot temperatures and dry air lead to the perfect conditions for wildfires, spurring air quality alerts from smoke. But those exact conditions can also exacerbate ground-level ozone, one of the main pollutants in smog.