Beginning of the <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Great_Smog" id="mw9Q" rel="mw:WikiLink" title="Great Smog">Great Smog</a> in London. A cold fog combines with air pollution and brings the city to a standstill for four days. Later, a <a href="https://en.wikipedia.org/wiki/Department_of_Health_and_Social_Care" id="mw9g" rel="mw:WikiLink" title="Department of Health and Social Care">Ministry of Health</a> report estimates 4,000 fatalities as a result of it.<sup about="#mwt107" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-20"}}' id="cite_ref-20" rel="dc:references" typeof="mw:Extension/ref"><a href="./December_5#cite_note-20" id="mw9w" style="counter-reset: mw-Ref 20;"><span class="mw-reflink-text" id="mw-A">[20]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-20"><cite about="#mwt104" class="citation magazine cs1" id="CITEREFHumphreys2012">Humphreys, Julian (December 2012). Attar, Rob (ed.). "Milestones". <i id="mwCAQ">BBC History magazine</i>. Northampton: BBC. pp.<span id="mwCAU" typeof="mw:Entity"> </span>10–11.</cite><span about="#mwt104" class="Z3988" id="mwCAY" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=BBC+History+magazine&amp;rft.atitle=Milestones&amp;rft.pages=10-11&amp;rft.date=2012-12&amp;rft.aulast=Humphreys&amp;rft.aufirst=Julian&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ADecember+5"></span></span>