Texas chemical plant blasts: 50,000 people return home as fire contained

What happened: The first blast on Wednesday wounded three plant employees as it "blew out the windows and doors of nearby homes" and sent toxic plumes into the air just after 1 a.m. Wednesday, per CBS News. Jefferson County Judge Jeff Branick told a news conference it knocked out power to the plant, per CNN.

• A second explosion in the afternoon, 13 hours later, propelled a tower into the air "like a missile" toward the nearby Port Neches-Groves High School, Branick said.
• A third blast followed soon after, reports Fox26 Houston, which notes it's hard to say precisely how many explosions there have been, but several smaller ones have been noted.
• There were "a bunch" of towers left, Branick said, per the New York Times. "The concern is that if another one were to launch ... and it were to go into the tank farm, the results would be catastrophic," he said.
• The evacuation order was in effect within a 4-mile radius from the plant, per AP.

The big picture: Concerns have been raised about "the adequacy of health and safety regulations as well as the environmental effects from the accidents," after a string of fires and explosions at chemical plants in recent years, the Times notes.

• The NYT points to an April fire at a Houston chemical facility that killed one person and critically wounded two others; a petrochemical plant blaze in March just outside the Houston metropolitan area that "burned for days;" a 2017 explosion during a tropical depression at a plant in Crosby, northeast of Houston; and a deadly blast at a West, Texas, fertilizer plant in 2013.

Editor's note: This article has been updated with new details throughout.