fume

Quick reading. No words, but basic words.

Eleven people taken to hospital after reports of chlorine leak at London pool
https://www.theguardian.com/uk-news/article/2024/aug/29/eleven-people-taken-to-hospital-after-reports-of-chlorine-leak-at-london-pool-wembley

<basic words>
chlorine (pronunciation)
hazardous < hazard
learner pool
fume
elevated readings
reading [Cambridge]the number or amount that a piece of measuring equipment shows
[quote]Firefighters ventilated the area and monitored the levels of fumes until there were no elevated readings.

Because the article doesn't mention the cause of the incident has not been reported, I researched it. I searched in Japanese...It's much quicker...
プール施設における塩素ガス発生事故に注意！
https://www.tfd.metro.tokyo.lg.jp/lfe/topics/201505/poolensogas.html.