WICHITA — The Wichita school district is warning parents that temporary school closures may be necessary because so many teachers are out sick amid a rise in COVID-19 cases, while some Kansas City-area cities are introducing new mask mandates.

The Wichita district — the sate’s largest with 47,000 students — hopes to give parents two to three days’ notice before closing schools, Superintendent Alicia Thompson told parents in an email. But she said she couldn’t promise decisions won’t be made more quickly, The Wichita Eagle reports.

“Based on what we see happening in our district and our community, that notification could be provided one day to take effect the following day,” Thompson said.

The Bonner Springs and El Dorado districts already have canceled classes. Virtual learning isn’t an option because of limits that lawmakers put in place last year.

Hoping to provide relief to understaffed district, the state board of education voted Wednesday to ease application requirements for substitute teachers.

The staffing crunch comes as newly elected Wichita board members have indicated that they want to do away with the district’s mask mandate.

School board President Stan Reeser suspended Monday evening’s meeting without calling it to order because three members refused to put on masks.

In the Kansas City area, the Johnson County cities of Roeland Park, Mission and Prairie Village on Wednesday passed rules requiring masks in public places starting Tuesday. Violators will be subject to $25 fines.