Transcript for 4 Dead in Oil Rig Explosion Off Gulf of Mexico
You're starting with new information about that huge explosion in the gulf. Yes, George, there are incredible pictures this morning from the explosion that engulfed an oil rig in flames, fireballs shooting into the sky, workers jumping for their lives. ABC's Ryan Owens has new information about the environmental risk. Reporter: A fire like this would be difficult to fight on land, but in the middle of the gulf of Mexico, the feat was monumental. With firefighters on cruise ship size boats working well into the night to douse the inferno. The blast that sparked it happened well before dawn Wednesday on the oil rig off the coast of Mexico. This worker saying some of them had to jump into the water. Some took cell phone video. Four people died. More than 300 evacuated. Dozens of them hurt. This morning, the Mexican state run company that owns the rig said it's investigating what caused the fiery blast and insists an oil spill has been prevented. A major concern, especially given the similarities to the historic deepwater horizon blast which resulted in an unprecedented spill in the gulf in 2010. The somber five-year anniversary coming up this month. For "Good morning America," Ryan Owens, ABC news, Dallas.
This transcript has been automatically generated and may not be 100% accurate.