Washington, D.C. joined Maryland and Virginia in enacting "stay-at-home" mandates Monday amid the coronavirus outbreak. They join states like New York, New Jersey, California and Washington — all among the hardest hit by the spread of COVID-19 — in locking down residents' movements. The U.S. counts the most coronavirus cases of any country, according to data compiled by Johns Hopkins University, with more than 153,200 confirmed cases of the virus and at least 2,828 deaths. With more than half of U.S. states now ordering residents to stay at home, more restrictions could be down the line. Here's what each place announced Monday:

DC enacts stay-at-home order

DC Mayor Muriel Bowser speaks at the End Gun Violence Together Rally hosted by TOMS at Union Market Dock 5 on February 11, 2019 in Washington, DC. Paul Morigi | Getty Images

Washington, D.C. Mayor Muriel Bowser issued a stay-at-home order for the nation's capital on Monday. Those found guilty of violating the order, which is considered a misdemeanor, could be subject to a fine of up to $5,000 and face imprisonment of no more than 90 days, according to Bowser. Residents of the city are still allowed to leave their homes to perform an essential job and for essential activities such as obtaining food or medicine. People are also able to engage in certain outdoor recreational activities. "Many people want to know how they can help right now, and for most people this is how – by staying home," Bowser said in a tweet about the order. Washington, D.C. has 401 confirmed cases of the coronavirus, according to the city. The capital has a population of more than 705,000, according to the U.S. Census Bureau.

Virginia under stay-at-home order until June 10

During his gubernatorial campaign, Ralph Northam greets supporters at an election-night rally on Nov. 7, 2017, in Fairfax. Win McNamee | Getty Images News | Getty Images

Virginia Gov. Ralph Northam issued a statewide stay-at-home order that is effective immediately. The order extends until June 10, making it one of the longest statewide mandates implemented so far. The order follows a weekend during which beaches were packed, Northam said at a press briefing. He advised residents that they should now only leave their homes for groceries, medical treatment, work or exercise. "Don't go to the store for just one thing," Northam said. "Wait until you have a list. If you're traveling from out of state, stay in quarantine for 14 days. Every age group needs to act responsibly and stay home." He said that people would not be thrown in jail for disobeying the order, but that police would be enforcing the new restrictions. Virginia has more than 1,000 coronavirus cases, almost half of which are people under 50, according to Northam.

Maryland issues stay-at-home order

Maryland Governor Larry Hogan speaks at the New Hampshire Institute of Politics as he mulls a Presidential run on April 23, 2019 in Manchester, New Hampshire. Scott Eisen | Getty Images