Residents in Herne Hill woke up this morning to find their homes flooded because of a burst water pipe.
Luke Hanranhan reports.
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A number of people were treated at the scene at Oxford Circus by paramedics for coughing and lack of breath.
If temperatures stay high in the same spots for three consecutive days, the Met Office deems it a heatwave.
Some posts also linked to false press releases calling for the release of drill artist Digga D.