<img class="styles__noscript__2rw2y" src="https://s.w-x.co/util/image/w/IowaSemis01.jpg?v=at&w=485&h=273" srcset="https://s.w-x.co/util/image/w/IowaSemis01.jpg?v=at&w=485&h=273 400w, https://s.w-x.co/util/image/w/IowaSemis01.jpg?v=ap&w=980&h=551 800w" > Four semitrailers were blown over by high winds near Adair, Iowa, on Tuesday, August 20 2019. (Iowa State Patrol/Facebook)

At a Glance Four semitrailers were blown over on Interstate 80.

The National Weather Service confirmed at least three tornadoes in Iowa early Tuesday morning. Severe storms brought high winds and at least three tornadoes to parts of Iowa early Tuesday morning.

Four semitrailers were blown over by high winds on Interstate 80 near Adair, about 50 miles west of Des Moines, according to the Iowa State Patrol. Minor injuries were reported. The National Weather Service was trying to determine if straight-line winds or a tornado had caused the incident, according to the Associated Press.

The National Weather Service confirmed a tornado touched down near De Soto, which is near Interstate 80 between Adair and Des Moines, at 5:21 a.m. The weather service also said a tornado touched down south of Des Moines in Lacona. A third tornado was confirmed in Tracy, west of Lacona.

“For the city of Lacona, there are 50 homes affected by trees or shingles pulled off, what have you," Warren County Emergency Management Coordinator Troy Bass, told weather.com. "There’s probably 10 to 15 homes that have some minor to major damage due to pieces of roofing blown off such as sheeting, or trees going through the wall.”

Bass said there were no reports of inuries.

Bass said another 30 or so agricultural sites, such as outbuildings or farm businesses, sustained damage in the county. Lacona has a population of about 400 people, and the county has about 50,000, he said.

Tornado sirens did not go off until right as the weather was hitting the area because of a lightning strike near or at the communications center, Bass said. But he said people were warned through weather apps, radio and other means.

He added that two lines of storms moved through the area, back-to-back, and damage suggests there might have been two tornadoes.

“It was kind of like boom, boom, a couple minutes apart," Bass said. "It was one of those freaky storms.”

Scattered power lines and trees were down in Des Moines, including one that landed on a car, ABC5 reported.

At least two fires are believed to have been caused by ligthning during the storms, one at a home and one at an apartment building.

Weather.com meteorologist Christopher Dolce said the storms moved southeast after hitting Iowa.

"A large thunderstorm complex erupted over Iowa overnight before advancing southeastward toward Illinois and Missouri in the morning hours," Dolce said. "These storm complexes are common in the Midwest in summer and often produce damaging straight-line wind gusts along with large hail and brief tornadoes."