ATLANTA, Ga. — After severe weather and thunderstorms moved through the metro Atlanta area and led to a ground stop at Hartsfield-Jackson Atlanta International Airport on Friday evening, thousands of travelers have been impacted on Saturday morning.

According to flight tracker Flight Aware, 433 flights were canceled and 388 flights have been delayed as of 12:45 p.m. on Saturday.

This comes as officials estimate over 4 million people will pass through Atlanta’s airport during the Fourth of July holiday travel period.

Atlanta airport officials urge travelers to continue monitoring their social media channels and check directly with their airline for updates.