Breaking news tonight's state of emergency. Record-breaking flooding in Michigan after water breaches two dams, forcing thousands to evacuate.

Evacuates the area. Houses submerged. The roof of this building torn off, the National Guard moving in, and all of it in the middle of a pandemic, has workers screen evacuees for

coronavirus before they can take shelter. We're on the ground tonight. All 50 states ease restrictions.

After almost two months, America begins to move to reopen. Ford temporarily closes two plants

after workers test positive for COVID. How the

major automaker says it is keeping its employees safe. Racing to a cure, what happened

in monkeys after they were exposed to the virus. The results tonight giving researchers at Harvard

hoped for a vaccine. New guidelines. The CDC quietly releases its 60-page reopening roadmap. Why now? And the advice for schools if a student test positive for COVID.

Anger over voting. Why the president threatened to withhold federal funds from two states over their rules about mail and voting.

Demanding a refund. Airline passengers who canceled their trips want their money back.

Why some airlines are saying, not so fast. And the pandemic sparks a new outbreak of bike riding.

This is the CBS Evening News with Nora O'Donnell, reporting from the nation's capital.

Good evening and thank you for joining us. It is great to be back with you. We're going to begin with breaking news of historic floods in Michigan, which tonight is under a state of emergency

after torrential rains caused one dam to fail and another to breach. Rivers there are still

rising as we come on the air, and floodwaters in some neighborhoods could soon be as deep as

nine feet. Ten thousand people have been forced from their homes and into shelters where tonight the governor

is asking them to wear masks and maintain social distancing. Michigan is already dealing with one of

the largest coronavirus outbreaks in the Midwest with more than 53,000 confirmed cases. Nationwide,

there are now more than 1.5 million confirmed cases, and more than 93,000 people have been killed by the virus in the U.S.

Tonight, all 50 states have now lifted some stay-at-home restrictions after Connecticut allowed museums and offices to reopen and restaurants to serve meals outdoors.

But heading into Memorial Day weekend, experts are concerned about infection spiking after

seeing outbreaks in some areas that have already reopened.

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