At least three people are dead in rural North Dakota after tornadoes left damage across eastern areas of the state, according to a Cass County Sheriff’s Office release Saturday.

The deaths came after a series of large and long-lasting storms moved through North Dakota and Minnesota Friday night.

Three people are dead and a regional airport was heavily damaged after powerful winds, including a tornado, swept across the upper Midwest, while nearly 150 million Americans were under a heat advisory or warning.