Massive high-rise fire causes building to collapse in Brazil, at least 1 dead A massive fire engulfed two high-rise structures in Sao Paulo, Brazil.

A massive fire engulfed two high-rise structures in Sao Paulo, Brazil, on Tuesday, causing one of the buildings to collapse.

Video posted on social media early Tuesday showed a 24-story building crumbling to the ground as flames raced toward the top floor, killing at least one person. Half of the floors in a second building were engulfed in flames, but authorities said it was not in danger of collapsing.

At least three people, including a mother and her twins, were missing, the Sao Paulo Fire Department told ABC News.

"I heard two explosions. It was terrible," one witness told ABC News. "My girlfriend was asleep with our daughter. I don't know if I will ever be able to sleep again."

Jacqueline Silva, 20, told ABC News she started running out of the building when she heard people shouting "Fire!"

"I did not know if I had to take any belongings with me. The firemen told us to slow down. I was so terrified," she said.