New Delhi, Aug 19 (IANS): The marquee put up at the Ramlila ground, where civil society leader Anna Hazare will continue his fast for a strong, anti-corruption law, is not waterproof, authorities said Friday as the weather office forecast rain during the day.

"The ground is already wet. If more rains come it will be difficult to handle," Deputy Mayor Anil Sharma said.

Hundreds of people are expected to gather at the Ramlila ground to support Hazare, who is expected to leave Tihar Jail at 11 a.m. Friday, said his aide Arvind Kejriwal.

Hazare, 74, had planned to begin his fast for a stronger Lokpal Bill at the J.P. Park in the ITO area here Tuesday.

Delhi Police imposed certain conditions before the protest could be allowed. Hazare, however, refused to agree, after which the police detained him and his associates Tuesday.

He was sent to Tihar Jail and was subsequently released Tuesday night, but refused to leave the prison until he was allowed to carry on the fast without any conditions.

Hazare started with his fast Aug 16 inside Tihar Jail.