Seventy-nine people were injured after the ceiling collapsed at the Apollo Theatre on Shaftesbury Avenue last night, a London Ambulance Service spokesperson said.
"By the time the scene had been completely cleared, we had treated 79 patients," the spokesperson said.
Of those patients, nine were seriously injured, they added.
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Thousands of gallons of waste, including rotting animal carcasses, are being dumped in the countryside, an investigation has found.
Rain in the north tonight, cloudy and humid in the south
In an exclusive interview with ITV News, 100 metre world champion Justin Gatlin also said that booing at the World Championships "did hurt".