Rowena Cockayne from North London stands to lose around £100 a week when her benefits are capped in July.
The mother of two said she will not be able to pay her rent and will end up being evicted, "I don't know where I will be sent, even further away from my support network."
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Passengers, including a pregnant woman, say they have been stranded since 4pm yesterday.
The boxer said it was the "least he could do" and even donated the £30,000 shorts he wore in his last fight against Devon Alexander.
By Sunday it should become drier with spells of winter sunshine but temperatures will still remain on the cool side.