2026年5月23日 美国东部时间上午11:20 / 哥伦比亚广播公司新闻
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克里·布林 新闻编辑
克里·布林是CBSNews.com的新闻编辑。她毕业于纽约大学亚瑟·L·卡特新闻学院，此前曾在NBC新闻《今日数字》工作。她负责报道时事、突发新闻以及包括物质滥用在内的相关议题。
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数万南加州居民已被疏散，此前官员警告称，一家航空航天工厂内一个正在泄漏的盛装“高度易燃”物质的储罐势必失效，并有潜在爆炸风险。
据橙县消防局局长克雷格·科维介绍，GKN航空航天公司的这个储罐预计装有7000加仑甲基丙烯酸甲酯，这是一种用于塑料生产的“高度挥发性”物质。科维表示，目前尚不清楚储罐何时会失效。
南加州大学化学副教授伊莱亚斯·皮卡佐表示，甲基丙烯酸甲酯是一种易燃的塑料环氧树脂，会自行发热。这意味着如果它泄漏到大气中，任何火花或闪光都可能引发失控火灾或爆炸。目前，消防官员正努力为储罐降温。
科维告诉哥伦比亚广播公司洛杉矶分社，这是他数十年消防生涯中参与过的“最具危险性的重大事件”。
“这是我见过最严重的情况，”他补充道。
截至目前，尚无人员受伤或死亡的报告。GKN航空航天公司位于洛杉矶以南约38英里的加登格罗夫市。
甲基丙烯酸甲酯的健康风险
健康专家告诉哥伦比亚广播公司洛杉矶分社，甲基丙烯酸甲酯是一种呼吸道刺激物。接触该化学物质可能导致肺部、皮肤和眼睛受刺激，以及恶心和头晕。
科维表示，目前有“两种应对方案”。其中一种情况是，储罐失效并将数千加仑“极具危害性的化学品泄漏到停车场及该区域”，他说道。
由于该化学品比空气重，其蒸汽会沉降下沉。科维表示，工作人员已用沙袋搭建了防护屏障，防止任何泄漏的化学品流入雨水管道或附近水道。
科维称，第二种情况是储罐发生爆炸。这将使甲基丙烯酸甲酯颗粒飘散到空气中。目前尚不清楚此类爆炸的波及范围或危险程度。失控爆炸还会影响周边存放化学品和燃料的储罐。
周六，为储罐降温的工作仍在继续。科维表示，他和其他官员也在努力寻找其他安全结束这一事件的方案。
科维称，截至周五，尚未有任何可能危害公众健康的颗粒进入空气，储罐也没有活跃的烟羽排放。不过，民众仍被建议留在室内。
该航空航天工厂方圆一英里范围内的住宅已被疏散。目前尚无解除疏散令的时间表。
泄漏原因仍在调查中。
Los Angeles tank holding dangerous chemicals is set to explode or leak, officials say. Here’s what to know
May 23, 2026 11:20 AM EDT / CBS News
By
Kerry Breen News Editor
Kerry Breen is a news editor at CBSNews.com. A graduate of New York University’s Arthur L. Carter School of Journalism, she previously worked at NBC News’ TODAY Digital. She covers current events, breaking news and issues including substance use.
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Tens of thousands of Southern California residents have been evacuated after officials warned a leaking chemical tank holding a “highly flammable” substance at an aerospace facility would inevitably fail and potentially explode.
The tank at GKN Aerospace is estimated to contain 7,000 gallons of methyl methacrylate, a “highly volatile” substance used in the production of plastics, according to Orange County Fire Authority Chief Craig Covey. It is not clear when the tank will fail, Covey said.
Methyl methacrylate is a flammable plastic epoxy that generates its own heat. That means if it leaks into the atmosphere, any spark or flash could lead to an uncontrolled fire or explosion, said Elias Picazo, an associate professor of chemistry at the University of Southern California. At the moment, fire officials are working to keep the tank cooled.
Covey told CBS Los Angeles that this is “the most significantly dangerous event” he’s been a part of in his decades in fire service.
“This is bad as I’ve ever seen,” he added.
So far, no injuries or deaths have been reported. GKN Aerospace is in Garden Grove, a town about 38 miles south of Los Angeles.
Emergency personnel respond to a hazardous materials incident at GKN Aerospace in Garden Grove, Los Angeles. Allen J. Schaben/Los Angeles Times via Getty Images
Health risks of methyl methacrylate
Methyl methacrylate is a respiratory irritant, health experts told CBS Los Angeles. Exposure to the chemical can cause lung, skin and eye irritation, nausea and dizziness.
Covey said there are “two options” right now. In one scenario, the tank could fail and spill thousands of gallons of “very bad chemicals into the parking lot and that area,” he said.
Because the chemical is heavier than air, its vapor would settle and sink. Covey said crews have used sandbags to build containment barriers so that any spilled chemicals do not leak into storm drains or nearby waterways.
In the second scenario, the tank could blow up, Covey said. This would send methyl methacrylate particles into the air. Covey said it’s unclear how widespread or dangerous such an explosion could be. An uncontrolled explosion would also affect surrounding tanks, which hold chemicals and fuel.
Efforts to keep the tank cool are continuing Saturday. Covey said he and other officials are also working to determine other options to safely end the incident.
Covey said no particles that could compromise public health have entered the air as of Friday, and there is no active plume emitting from the tank. However, people have been advised to stay indoors.
Homes within a one-mile radius of the aerospace facility have been evacuated. There is no timeline for when the evacuation orders will be lifted.
The cause of the leak remains under investigation.
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