The document lists 52 flood-prone zones in Singapore as identified by PUB as of July 2010. These zones include areas such as Orchard Road, Opera Estate, Jalan Boon Lay, Admiralty Road West, Alexandra Road, Bedok South Road, Benoi Sector, Bukit Timah Road, Commonwealth Avenue, Clover Park Estate, Delta Road, Farrer Park Area, First Lok Yang Road, Frankel Avenue, Hong Kah Area, Indus Road, Jalan Besar Area, Jalan Mashor, Lorong Chuan, Lower Delta Road, Meng Suan Road, Mountbatten Road, Nee Soon Road, Newton Road, Old Lim Chu Kang Road,