A muddy trail of destruction caused by a departing circus will be put right as soon as the ground dries out, according to the operator.
Heavy rain and snow meant a large section of Southall Park was turned into a bog by Zippo's Circus, which ran shows on the site from October 30 to November 4.
Concerns were raised about the cost of the clean-up and the time it will take for grass to regrow on the affected area.
Norwood Green councillor Rajinder Mann said: "The park is so damaged that people can't walk through it.
"This is ridiculous. We've spent a lot of money on the park and a lot of people have complained. Now we will have to spend more money and it will take a long time to recover."
It is not yet known how much it will cost to repair the damage or how long it will take for new grass to grow, but Ealing Council has pledged to make Zippo's pay to put it right.
A council spokeswoman said: "The ground needs to dry out before it can be reseeded. In the meantime we have asked for quotes for the work.
"The council holds a £2,000 deposit and the cost of the work to restore the grass will be taken out of that pot before the money is returned. If the repair work exceeded that amount, the council would invoice the circus."
Martin Burton, the director and founder of Zippo's, said he is waiting for the right conditions before he can bring in the machinery needed to reseed it.
He said: "We did as much as we could initially after the event, we now need the park to dry out. It's unfortunate that the weather was so completely horrendous that we weren't able to vacate without creating some mud and rutting.
"There was no rain before we pulled up, but then it rained heavily and at one point there was two inches of snow.
"The elected members and the local temple supported us in bringing the circus to the park, and there were 5,000 people who came to see us in the six days that we were there.
"We are responsible operators and we will put the park right."