Houston police responded to reports of an explosion at Watson Grinding and Manufacturing, a machining and manufacturing company, around 4:25 a.m.
SEE MORE: Massive explosion in NW Houston felt the area
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The owner of the facility says the explosion was caused by a propylene tank which is an extremely flammable gas that is used to make a variety of products.
ABC13 spoke with environmental toxicologist Dr. Noreen Khan-Mayberry about the incident.
RELATED: Moment of explosion caught on video at Watson Grinding in NW Houston
She says propylene is a respiratory hazard that could cause eye and skin irritation. She says people with asthma and allergies should be extra cautious if they're in the area.
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You should use a half respirator and protect your skin if you're taking medication that makes your skin sensitive, Dr. Khan-Mayberry said.
Also, those with chronic skin diseases like psoriasis are urged not to drive in the area.
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