Chemical tank crack eases explosion fears as 50,000 residents flee California

US officials hope damaged tank at California aerospace site will relieve pressure and avert blast risk

A damaged chemical tank in southern California cracked over the weekend, which authorities were hopeful would relieve pressure and reduce the risk of an explosion.

Some 50,000 residents in Garden Grove, a city of roughly 170,000 about 40 miles (60km) south of downtown Los Angeles, have been evacuated and are waiting for a resolution.