The Environment Agency has issued 72 flood warnings for the south east, in which immediate action is required, as heavy rain continues to bring travel misery to commuters.
Areas around the River Thames including Greater London, Hertfordshire and Surrey are expected to be worst hit by the downpours this weekend.
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"I do not accept the allegation that I have brought the Labour Party into disrepute", said Livingstone.
Family and friends of the victims of Grenfell Tower have been paying tribute to those who perished in the disaster.
The balmy conditions have swept in on a high pressure system, dragging in hot air from the continent, according to the Met Office.