Storms, extreme heat, and wildfire risks are disrupting record-breaking Fourth of July travel, causing flight delays, road congestion, and safety warnings.

A record number of Michiganders are expected to travel around the July 4th holiday, with more than 2.6 million hitting the roads or taking to the skies.

A record number of travelers are expected this July 4 week. According to AAA, 72.2 million people will travel at least 50 miles from home through Sunday, July 6, throughout the U.S. Most of those travelers—61.