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ST. LOUIS – For the second time in just over 12 hours, St. Louis City firefighters responded to battle a fire at a vacant warehouse just north of downtown.

The latest call came out around 8:00 a.m. for a one-story vacant warehouse at Collins and Florida near the Stan Musial Veteran’s Memorial Bridge. The fire quickly grew to a second alarm, with crews dousing the warehouse with lots of water.

Authorities told us the warehouse that caught fire Wednesday morning had also been the scene of another fire within the past year. This latest fire comes after a five-alarm fire at a vacant warehouse Tuesday night just a couple of blocks away at North 1st Street and O’Fallon.

Crews were still putting water on that fire Wednesday morning – the warehouse there was destroyed by the fire.

St. Louis Fire Chief Dennis Jenkerson said he believes both of these fires were most likely caused by homeless people trying to stay warm during colder nights. Jenkerson expects more of these kinds of fires as the weather gets colder.

He also shared that the vacant warehouse fires certainly pose safety hazards for firefighters, and there is a risk of the fires spreading to buildings that are still in use. Jenkerson explained that the city fire crews know how to deal with these kinds of fires and do all they can to contain them quickly.

For the most part, these two vacant warehouse fires were contained to just the building where they started.

FOX 2’s Bommarito Automotive Group SkyFOX helicopter flew over the scene. FOX 2 will continue to update this story with more information as it becomes available.