Niagara Falls has barred the public from City Hall, acting City Administrator Anthony J. Restaino announced late Wednesday.
The city had been trying to keep the building open by limiting visitors to City Hall offices to one at a time.
Next week's City Council meeting will be held without spectators. Public comments on Wednesday night's agenda and on topics "for the good of the city" may be emailed to the city clerk.
Employees will be available by phone.
"With the first identified case of coronavirus here in the western region of Niagara County, these measures are being taken for the health and welfare of our residents and our city employees," Restaino said.
Saturday morning's Council outreach public meeting has been canceled, Council Chairman Christopher P. Voccio said.
The city also waived parking restrictions, such as alternate side and limited time parking, for the duration of the state of emergency.