It was a scary situation for people at a Phoenix apartment complex when the monsoon storm blew off the roof at an apartment complex.

It happened at 25th and Van Buren streets on Monday evening.

The powerful storm lifted the roof off of a couple of apartments and landed on the cars in the parking lot.

One person was outside recording the storm and was hit by the debris, said Capt. Larry Subervi with the Phoenix Fire Department. The victim suffered a bad cut to his head and is in serious condition.

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[RELATED: Monsoon rolling through Phoenix metro area with dust, hard rain, hail]

About 20 people were displaced, Subervi said. Those people are being moved to available units in the complex.

Jacinta Dickerson was inside when the storm came through.

"I was sitting in our room and our door flew open," said Dickerson.

[SLIDESHOW: Massive storm blows east to west cross Phoenix metro area]

She said she told people to get inside when she saw the roof blow off.

"It was like a disaster," said Dickerson.

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[SPECIAL SECTION: Monsoon 2018]

[WEATHER: Get your local forecast | Hourly forecast]

A woman named Jessica said she is one of the people displaced.

"I was using the bathroom and then the roof just flew off," said Jessica. "I see the sky and it starts raining on me and I'm trying to hurry up and get up."

The apartment complex is close to Sky Harbor which reported 70 mile per hour winds.

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