According to Sarasota County:
Water will be shut down on Siesta Key from 11:58 p.m. Tuesday, Feb. 21 through 8 a.m. Wednesday, Feb. 22 as public utilities crews replace and repair water hydrants and leaking valves. Approximately 1,600 customers will be impacted by the shutdown, including businesses in the Siesta Key Village.
Once service has been restored, a precautionary boil water notice will be in place. Public utilities personnel have notified the impacted businesses in-person, along providing door hangers and boil water guidelines. Residential customers will receive an Everbridge notice.
This map highlights the areas on the Key that will be impacted:

