Weather 
GARDEN GROVE, Calif. () — The toxic chemical inside the large storage tank that was leaking in Garden Grove is methyl methacrylate, or MMA.
It is a highly volatile and flammable chemical that, according to the Environmental Protection Agency, is used to make resins and plastics.
LIVE UPDATES: Tank leaking toxic chemicals in Orange County will spill or explode, officials say
Doctors say the chemical can irritate the skin and eyes.
Short-term exposure – such as inhalation – can cause significant irritation of the lungs and nasal passages. It can also lead to nausea and dizziness.
More severe effects are also possible.
“At very high levels, it can really cause severe respiratory distress and hospitalization, and this is where we really need everybody to heed all the evacuation orders,” said Orange County Deputy Health Officer Dr. Regina Chinsio-Kwong.
As for long-term effects, doctors say it may impact other organs.
The chemical can also affect birds and other animals, though the effects may vary by species.
First responders are also taking into account the potential for a hazardous plume.
Officials said they are actively monitoring air quality and, as of early Friday afternoon, levels were within normal limits.
© 2026 Television,
