The Tai O Rural Committee and local residents have asked visitors to stay away from residential areas of the popular tourist village.
The rural committee posted a notice on Friday requesting tourists not to enter residential areas, Oriental Daily reports.
Inhabitants of the historic stilt housing districts, including Yee Chung, Sham Chung, Sun Sha and Sha Chai Min, have posted similar notices.
However, Oriental Daily noted that many of the popular landmarks, such as the suspension bridge and local restaurants, were continuing to attract visitors, while some tourists said they had not encountered any obstructions.
Eddie Tse, head of the Tai O Sustainable Development Education Workshop, said the number of tourists to Tai O had increased in recent months.
He said that while the old stilt housing areas were some distance from the main street, they still attracted sightseers wanting to take photographs.
He said many of the local residents were elderly and vulnerable, and the narrow streets and closely-packed stilt homes could accelerate the spread of the coronavirus. Local residents fear the entry and exit of outsiders will increase the risk of spreading the disease.