An explosion rocks a large part of southwest Houston. KHOU reports the explosion rattled windows and shook walls across an entire neighborhood and could be felt all the way from Cypress to La Porte.

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Houston Chief Art Acevdeo says the debris field extends out a half mile. Here's video of the actual explosion from a nearby home.

4500 Gessner is the location of the building explosion, report Houston police.  At this point, we've not confirmed the name of the business or what may be in the air from it.

One person has been transported to a hospital for treatment, but there's no word yet on the extent of the injury.

Firefighters are going door-to-door in the area, telling people there's not a mandatory evacuation, but suggest that people should consider getting out of the area.  A shelter has also been set up to help those who need it.