About 16,000 people remain under evacuation orders in Southern California as an overheated chemical tank still poses a risk to homes closest to the site, and officials gave no word Tuesday on when residents might be able to return home.

Authorities are bracing for the possibility that a damaged chemical tank at a facility in Southern California could leak or explode.

Overheated tanks at risk of exploding have prompted emergency response efforts and evacuations in Garden Grove, California.