Washington, D.C., has updated the list of states for which the city has travel restrictions because of the coronavirus pandemic.
Delaware, a popular vacation spot for D.C.-area residents, is back on the list of 30 states considered "high-risk." Hawaii and South Dakota also were added to the list on Monday.
D.C. Mayor Muriel Bowser said at a news conference Monday morning that the list is based on "our experience in a state at a given time" and can change. These states are high-risk because they have a high average level of new COVID-19 cases, city officials say.
Full coverage of the COVID-19 outbreak and how it impacts you and our communities
The travel restrictions are retroactive. If you visited one of the states in the past two weeks, you should quarantine.
Montana and New Mexico were removed from the list.
Bowser has ordered that D.C. residents who travel to or from high-risk states must quarantine for 14 days, leaving their home or accommodation for only necessary food and healthcare.
Anyone traveling for essential reasons is exempt but should monitor themselves for symptoms.
Here's the full list of states with a quarantine order:
Travel between D.C., Maryland and Virginia is excluded from the order.
"We think it's impractical for our neighbors in Maryland and Virginia to be part of the quarantine list," the mayor said.
Another updated list is set to be released on Sept. 7.
Also Monday, D.C. Health Director Dr. LaQuandra Nesbitt said that the city is now seeing more COVID-19 cases among young people in the 21 to 30 category.
D.C. officials are planning for a busy week, with the Republican National Convention and the March on Washington 2020 planned. People are expected to visit D.C. from out of town for both events.