We are asking people to stay in their houses because the electricity underground has not yet been isolated in the street outside.About 30 to 50 houses are affected and they are all thought to have basements which may be flooded.
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The unlicensed events unfolded on Saturday night at Clapham Common and Tooting Bec Common.
A 37 year old man who was taken to hospital after getting into difficulty in a stretch of water near Maidenhead has died.
Jonty Bravery, who is mentally ill, has been jailed for 15 years after throwing a six year old boy from the Tate modern balcony.