It isn't all doom and gloom; in south-west London, Merton Police have tried to lighten the mood by tweeting a picture of two snowmen, dressed in police garb and a row of police vans with faces drawn in the snow:
Forecasters have predicted it could be the coldest March in 50 years. In 1962, average temperatures for the month were 2.8C.
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Large plumes of black smoke could be seen coming from the boat which caught fire while anchored on the River Thames.
London mayor Boris Johnson is under pressure to issue health warnings about his new double decker bus during the heatwave.
It's all over in a split second when you watch on TV. But just look at what happens when a serve at Wimbledon is played in super slo-mo.