Colorado hit with heavy rain, hail, and lightning storms.

Heavy rainfall and hail caused flooding and other issues for residents in Boulder, with at least one car getting stuck in floodwaters. Residents are calling for the city to take action to prevent future flooding. The National Weather Service advises seeking shelter immediately when it starts hailing, pulling over to the shoulder of the road if driving, and not attempting to cross floodwaters on foot. "Turn Around Don't Drown" is the main advice for drivers encountering flooded roads.