The shift reflects the spread of the omicron variant.
As the COVID-19 pandemic has swept the globe, more than 5.3 million people have died from the disease worldwide, including over 816,000 Americans, according to real-time data compiled by Johns Hopkins University's Center for Systems Science and Engineering.
About 61.7% of the population in the United States is fully vaccinated against COVID-19, according to data from the Centers for Disease Control and Prevention.
Atlanta is reinstating an indoor mask mandate due to a recent case surge in the area, Mayor Keisha Lance Bottoms said.
"We are watching the data daily and will continue to engage experts for guidance on how best to provide for the safety and wellbeing of our communities," the mayor said in a statement.
New Orleans is moving ahead with Mardi Gras 2022, which falls on March 1, Mayor Latoya Cantrell announced.
Montreal Mayor Valérie Plante has declared a state of emergency due to omicron.
"This allows us to guarantee services to essential workers and vulnerable people, among others," she tweeted.
Quebec, the province home to Montreal, saw a record high of 5,043 new cases on Tuesday, according to CTV.
-ABC News' Christine Theodorou
Minnesota Gov. Tim Walz tweeted that he's tested positive for COVID-19, as have his wife and his son.
The governor said he and his wife are asymptomatic and his son, who is in the ninth grade, has mild symptoms.
Walz said his son is vaccinated and that he and his wife are vaccinated and boosted.
Walz tweeted, "I am confident that these vaccines are protecting my family and me from serious illness. … I encourage every Minnesotan to get tested, and get vaccinated and a booster."
