The City of Willis Point in Van Zandt County issued an indefinite boil water notice Thursday night.
The water system lost pressure, which could allow the growth of harmful bacteria and other organisms, according to city officials.
Wills Point Independent School District canceled classes Friday because of possible water contamination.
The latest news from around North Texas.
Authorities said they are testing the water supply and plan to provide an update at about noon Friday. [[347445021,C]]