Two high-end Miami-Dade County hotels have joined the many hospitality businesses that either furloughed or laid off hundreds of staff members amid the coronavirus pandemic.

The 326-key Mandarin Oriental, Miami hotel on Brickell Key furloughed at least 488 workers, and the 77-key Four Seasons at Four Seasons at The Surf Club in Surfside furloughed 360, according to filings with the state.

Businesses planning mass layoffs or furloughs are required to notify the Florida Department of Economic Opportunity's Reemployment and Emergency Assistance Coordination Team under the federal Worker Adjustment and Retraining Notification Act.

The state requires a 60-day advance notification to both the employees and the state, but given the immediate shutdown orders to prevent the spread of COVID-19, they didn't meet the deadline.

All Miami-Dade hotels closed under a March 21 order from Mayor Carlos Gimenez with few exceptions covering health care workers, federal and state employees and out-of-town journalists. The ones that stayed open tended to near the airport. Other nonessential businesses also were ordered to close with restaurants limited to pick up and delivery.

The Mandarin Oriental and Four Seasons submitted their state filings March 27, and the state posted them on its website within the last four days.

The 20-story Mandarin Oriental owned by Swire Properties Inc. opened in 2000 on 2.8 acres at 500 Brickell Key Drive offering views of Biscayne Bay.

The furlough is impacting 40 banquet servers, 38 cooks, 32 room attendants and others, including chefs and sous chefs, valet workers, bartenders, laundry workers and more, according to the state filing.

The furlough will be temporary and likely won't require filings under the WARN ACT, general manager Robert Lowe wrote in the letter to the state.

The 13-story Four Seasons owned by Fort Partners LLC was developed next to the historic Surf Club, an exclusive hideaway for stars like Frank Sinatra and Elizabeth Taylor.

The Four Seasons said the furlough would be temporary and impact 35 cooks, 31 servers, 18 spa therapists, 14 security officers and others, including pool and beach attendants as well as residential concierges.

The Surf Club, on the northeast corner of Collins Avenue and 90th Street, includes 150 condominium units in two 12-story buildings.

The Mandarin and Surf Club are among many hit economically by the pandemic. Miami's Four Seasons in Brickell furloughed 312 employees, and the DoubleTree by Hilton Hotel Miami and Airport Convention Center furloughed 206, although this hotel remains partially open.

While the pandemic may have shuttered many businesses for good, the Mandarin Oriental and Four Seasons expect to reopen. The Mandarin Oriental tentatively plans to reopen June 1, and the Four Seasons expects to start taking reservations May 1, according to their websites.