Officials say an industrial tank in Southern California containing about 7,000 gallons of highly flammable and toxic chemicals appears to have cracked. Experts say that could mean a rupture or catastrophic explosion may be averted. Thousands have been evacuated from several communities in Orange County. Lana Zak reports.

Original source: https://www.cbsnews.com/video/crack-in-california-chemical-tank-a-positive-sign-but-explosion-fears-remain/