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On Route 50 eastbound on the morning of March 31, a sign displays the stay-at-home order issued in Maryland the previous day. The District and Virginia have issued similar orders. (Jonathan Newton/The Washington Post)

The rise in Washington-area coronavirus cases continued to accelerate Tuesday as leaders scrambled to prepare for an even greater surge, cobbling together bed space and supplies while calling for more help and coordination from the federal government.

A day after leaders in the District, Maryland and Virginia ordered residents to stay home to limit the spread of the virus, the greater capital region added 477 known coronavirus cases, bringing the regional tally to 3,411.