One woman became trapped inside but fire crews managed to rescue her. Witnesses say the flames were intense.
"It was big. It was all the way to the top. Smoke was coming out up to our side and everything," said witness Clara Alcantar. "It looked like our side was on fire. It was bad."
It took about an hour for firefighters to get the flames under control. Four apartments were damaged, but no one was hurt.
People who were living in those apartments will be relocated to other units.