Chemical leak kills at least two workers at Texas oil refinery

Dozens of other people received medical treatment during Deer Park's second shelter-in-place order in weeks

At least two workers at a Houston-area oil refinery were killed on Thursday after hydrogen sulfide leaked at the plant, setting off urgent warnings for nearby residents to stay indoors before authorities later determined that the public was not in danger.

Nearly three dozen other people were either transported to hospitals or treated at the scene, said Ed Gonzalez, the Harris county's sheriff. Hours after the leak began, Gonzalez said the area was still unsafe for investigators to enter and that officials may not be able to get inside until Friday.