Officials say possible crack in unstable chemical tank may relieve pressure at aerospace plant

Crews responding to the chemical emergency at a Southern California aerospace facility discovered what officials described as a possible crack in the unstable tank that may be relieving pressure inside the vessel.

In a video update posted to social media Sunday, Orange County Fire Authority Interim Chief T.J. McGovern said specialized teams entered the hazard zone late Saturday night on a reconnaissance mission and visually identified what appeared to be a crack in the tank at the center of the crisis.