(NewsNation) — The record 72.2 million Americans expected to travel through the Fourth of July holiday weekend will have to contend with some serious storms.

Thunderstorms have already prompted ground stops at several major East Coast airports on Tuesday night, including at New York’s John F. Kennedy International Airport and New Jersey’s Newark Liberty International Airport.

Other affected facilities included Ronald Reagan Washington National Airport and Dulles International Airport, located near Washington, D.C.

Around 2,300 flights were canceled Tuesday, and more than 30,000 more were delayed, according to FlightAware data.

Fourth of July travel forecast: Where is severe weather expected?

Rainy days and severe weather are forecasted for parts of the United States. According to the National Weather Prediction Center, the Midwest will see the most dramatic weather ahead of the holiday weekend.

Strong to severe thunderstorms are forecasted for much of the region, including storms with potentially damaging hail, wind and rain in states like Nebraska, Kansas, Iowa, Missouri and Illinois.

Rain is likely in the Southeast, particularly Florida, where the risk of flash flooding continues through Thursday. Other states that could see flooding include Georgia, Alabama and the Carolinas.

July 4 will likely be stormy in the region, the National Weather Service has predicted.

While no extreme weather is predicted for the Northeast and West, there could be some storms and high temperatures across both regions.