Hundreds of residents are now plaintiffs in a mass case against Union Pacific alleging damages caused by legacy rail yard contamination in a north Houston neighborhood where higher rates of cancer were identified, said two local law firms.

The Gibson Law Firm, of Houston, and the Voss Law Firm, of The Woodlands, are representing about 500 residents as plaintiffs in a lawsuit filed to Harris County District Court in February against Union Pacific and its environmental consultants. The lawsuit was initially filed with 91 plaintiffs. Read more.…