GARDEN GROVE, Calif. (AP) — 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 Tuesday gave no word on when they might be able to return home.

The crisis forced 50,000 people to evacuate in and around the Orange County city of Garden Grove last week. A crack that formed by chance on the tank relieved pressure and helped avert a catastrophic explosion, allowing most evacuees to return home over the Memorial Day weekend.

But the risk of a smaller explosion or potential spill kept orders in place for about a third of the evacuees. Many are living out of hotel rooms, tents, emergency shelters at schools or staying with family or friends.

Isabel Mendez was among those still waiting to return to her mobile home. She said she broke out in a rash on her face and developed tingling lips and a sore throat while evacuating last week. After spending several expensive nights in a hotel, she is now staying with her mother in the Los Angeles area.

She remains uncertain about returning home because she does not trust official assurances that the area is safe.

“Of course it is still dangerous,” she said.

Exposure to methyl methacrylate — a highly flammable chemical used to make plastics — can cause serious respiratory problems, neurological problems and irritation to the skin, eyes and throat, according to the federal Environmental Protection Agency. The tank at GKN Aerospace Transparency Systems, which makes cockpit windows, canopies and windshields, contains 6,000 to 7,000 gallons (22,700 to 26,500 liters) of the chemical.

“We apologize for the ongoing disruption this incident is causing and our priority remains its safe resolution,” the company said, “so that residents can return to their homes as quickly as possible.”

Separately, an implosion of a chemical tank Tuesday at a pulp and paper mill in Washington state injured at least 10 people, while an undisclosed number of others had been killed or remained missing.

Crews at the California plant worked overnight to ensure two nearby tanks were neutralized and would not be affected by the compromised tank, Orange County Fire Capt. Brian Yau said.

Source: WPLG