42:I[185,["/_next/static/chunks/0sxns9k8ywops.js","/_next/static/chunks/11fk-1ie3w6mp.js","/_next/static/chunks/1uc4qdk4uj22c.js","/_next/static/chunks/0jvahffpql9nd.js","/_next/static/chunks/0agcep-t686m_.js","/_next/static/chunks/2_mrasy1s2owt.js","/_next/static/chunks/1nsk8jrr9fqe6.js"],"SendEmailButton"] 44:I[63625,["/_next/static/chunks/0sxns9k8ywops.js","/_next/static/chunks/11fk-1ie3w6mp.js","/_next/static/chunks/1uc4qdk4uj22c.js","/_next/static/chunks/0jvahffpql9nd.js","/_next/static/chunks/0agcep-t686m_.js","/_next/static/chunks/2_mrasy1s2owt.js","/_next/static/chunks/1nsk8jrr9fqe6.js"],"AddToLibraryButton"] 45:I[29721,["/_next/static/chunks/0sxns9k8ywops.js","/_next/static/chunks/11fk-1ie3w6mp.js","/_next/static/chunks/1uc4qdk4uj22c.js","/_next/static/chunks/0jvahffpql9nd.js","/_next/static/chunks/0agcep-t686m_.js","/_next/static/chunks/2_mrasy1s2owt.js","/_next/static/chunks/1nsk8jrr9fqe6.js"],"ShareButton"] 46:I[58016,["/_next/static/chunks/0sxns9k8ywops.js","/_next/static/chunks/11fk-1ie3w6mp.js","/_next/static/chunks/1uc4qdk4uj22c.js","/_next/static/chunks/0jvahffpql9nd.js","/_next/static/chunks/0agcep-t686m_.js","/_next/static/chunks/2_mrasy1s2owt.js","/_next/static/chunks/1nsk8jrr9fqe6.js"],"ProcessEpisodeButton"] 47:I[45269,["/_next/static/chunks/0sxns9k8ywops.js","/_next/static/chunks/11fk-1ie3w6mp.js","/_next/static/chunks/1uc4qdk4uj22c.js","/_next/static/chunks/0jvahffpql9nd.js","/_next/static/chunks/0agcep-t686m_.js","/_next/static/chunks/2_mrasy1s2owt.js","/_next/static/chunks/1nsk8jrr9fqe6.js"],"SignupCTA"] 3a:["$","time",null,{"dateTime":"2026-06-21T04:00:00.000Z","children":"June 21, 2026"}] 3b:["$","span",null,{"aria-hidden":true,"children":"·"}] 3c:["$","span",null,{"children":"00:13:39"}] 43:T544,

In December 1952, a thick blanket of fog descended upon London. At first, it seemed like a familiar winter nuisance. But this was no ordinary fog. Mixed with smoke from millions of coal fires and trapped by unusual weather conditions, it became a toxic cloud that brought one of the world's greatest cities to a standstill.

In this episode of History Shorts, we explore the deadly Great Smog of London, a five-day environmental disaster that turned daylight into darkness, halted transportation, and left thousands struggling to breathe. As hospitals overflowed and visibility dropped to just a few feet, Londoners found themselves confronting an invisible killer lurking in the air around them.

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