As London Lifeboat Week launched yesterday, the Tower lifeboat was scrambled to reports of a man stuck on an abandoned jetty.
Today volunteers from the Royal National Lifeboat Institution will take to the streets in their yellow jackets and oilskins to collect donations for the charity.
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Mayor of London Sadiq Khan is backing the scheme.
A spokesperson said the lightning strikes had left the "aircraft fuelling system unavailable."
Nearly 1,000 properties have been left without power, and road users have been warned of potentially hazardous conditions.