Governor Gavin Newsom (D-CA) declared a state of emergency on Saturday after a toxic chemical leak at an aerospace facility in Garden Grove [3].

The incident has forced tens of thousands of residents to flee their homes in Orange County, creating a massive public safety operation near one of the most visited tourist regions in the U.S.

The leak occurred on Friday, May 22, 2026, at a GKN Aerospace manufacturing plant [1]. A storage tank failed, releasing approximately 7,000 gallons [1] of methyl methacrylate into the surrounding area [1]. This specific chemical is flammable and toxic, posing both a significant explosion risk and severe health hazards to the local population [1].

Evacuation orders were issued as the chemical spread. Reports on the scale of the displacement vary, with some sources stating more than 40,000 Californians were evacuated [1], while other reports indicate 50,000 residents were told to leave their homes [2].

Local authorities coordinated the exodus in Garden Grove, a city located near Disneyland [5]. The theme park said it is monitoring the incident as a precaution [5].

Governor Newsom's emergency declaration on May 23, 2026, allows the state to mobilize additional resources and funding to manage the containment of the spill and the displacement of residents [3]. Emergency crews continue to work to stabilize the site and mitigate the risks associated with the flammable vapors.

Governor Gavin Newsom (D-CA) declared a state of emergency on Saturday after a toxic chemical leak.

The scale of the evacuation—potentially involving 50,000 people—underscores the volatility of methyl methacrylate and the high population density surrounding industrial zones in Orange County. By declaring a state of emergency, the governor has shifted the response from a local municipal effort to a state-level operation, which is necessary when the risk of explosion threatens critical infrastructure and major tourist hubs like Disneyland.