Authorities in Orange County, California, are managing a hazardous materials incident involving a pressurized tank of methyl methacrylate at a GKN Aerospace site in Garden Grove.

加州橙縣當局目前正在處理一起危險物質事故，涉及位於 Garden Grove 的 GKN Aerospace 廠區內一個裝有甲基丙烯酸甲酯的壓力儲罐。

The incident commenced on Thursday when a storage vessel containing between 22,700 and 26,500 liters of methyl methacrylate overheated and initiated the venting of vapors. Technical failure of the pressure relief valves has precluded the extraction of the chemical or the manual reduction of internal pressure. Consequently, the Orange County Fire Authority has implemented external cooling measures via water hoses and sprinklers to mitigate the risk of a thermal runaway reaction. Initial drone-based thermal assessments suggested stabilization; however, subsequent manual readings indicated that internal temperatures had risen from 77 to 90 degrees Fahrenheit, increasing at a rate of approximately one degree per hour.

事件始於週四，當時一個裝有 22,700 至 26,500 公升甲基丙烯酸甲酯的儲槽過熱並導致蒸氣洩漏。由於壓力釋放閥失效，無法抽出化學物質或手動降低內部壓力。因此，橙縣消防局採取了外部冷卻措施，透過水管和灑水系統來降低熱失控反應的風險。最初透過無人機進行的熱能評估顯示情況穩定；然而，隨後的手動讀數顯示內部溫度已從 77 華氏度升至 90 華氏度，且約每小時上升一度。

Stakeholder positioning reflects a high degree of caution. Governor Gavin Newsom has declared a state of emergency to facilitate the deployment of state resources and the establishment of shelters for approximately 40,000 to 50,000 displaced residents across Garden Grove and five adjacent cities. While the Disneyland Resort and other major venues remain outside the designated evacuation and blast zones, they continue to monitor the situation. The Orange County District Attorney has initiated an investigation into potential corporate negligence, and a class-action lawsuit has been filed by local residents citing anticipated depreciation of property values.

相關利益關係者的反應反映出高度謹慎。州長 Gavin Newsom 已宣布進入緊急狀態，以利於調派州政府資源，並為 Garden Grove 及五個鄰近城市約 40,000 至 50,000 名被迫疏散的居民建立避難所。雖然迪士尼樂園度假區及其他主要場館位於指定的疏散與爆炸區之外，但仍持續監控情況。橙縣地區檢察官已對潛在的公司疏忽啟動調查，而當地居民則因預期房產價值下跌而提起集體訴訟。

Technical experts, including Purdue University professor Andrew Whelton, have noted that while the volume of the chemical is significantly lower than in previous industrial disasters, such as the East Palestine derailment, the potential for severe structural damage and respiratory distress remains. Mitigation strategies currently focus on neutralizing adjacent tanks to prevent a chain reaction and establishing containment barriers to preclude the chemical from entering aquatic ecosystems.

包括普渡大學教授 Andrew Whelton 在內的技術專家指出，雖然化學物質的體積明顯低於以往的工業災難（如 East Palestine 脫軌事故），但仍可能造成嚴重的結構損壞和呼吸窘迫。目前的緩解策略集中於中和相鄰儲罐以防止連鎖反應，並建立圍堵屏障以防止化學物質進入水域生態系統。

The situation remains unresolved as emergency personnel continue to employ cooling techniques to prevent a catastrophic vessel failure.

由於緊急救援人員繼續採用冷卻技術以防止儲罐發生災難性失效，情況目前尚未解決。