The company where an explosion took place on January 24 is facing two more lawsuits.
Harris County is suing Watson Grinding and Manufacturing for failing to protect public safety from the potential dangers of propylene.
Sean Rangel, a Watson employee, also announced a lawsuit on Thursday.
Rangel says he was injured as he was parking his pickup at the plant early Friday morning just as the blast took place.
Two Watson employees were killed and hundreds of homes were damaged or destroyed.