Chicago Mayor Lori Lightfoot announced Thursday that the city is issuing an emergency travel order directing all residents and travelers entering Chicago from states experiencing an uptick in coronavirus cases to quarantine for 14 days in an effort to slow the spread of the virus.

The order, issued by Chicago Department of Public Health Commissioner Allison Arwady, is set to go into effect next Monday. As of Thursday, the states included in the order were Alabama, Arkansas, Arizona, California, Florida, Georgia, Idaho, Louisiana, Mississippi, North Carolina, Nevada, South Carolina, Tennessee, Texas and Utah.

A state will be designated under the order “if it has a case rate greater than 15 new COVID-19 cases per 100,000 resident population, per day.” The rate will be determined “over a 7-day rolling average,” according to the order.

Read more at The Hill.