Plant shutdowns are leaving the U.S. dangerously close to meat shortages as coronavirus outbreaks now spread to suppliers across the Americas.

Almost a third of U.S. pork capacity is down, the first big poultry plants closed on Friday and experts are warning that domestic shortages are just weeks away. Brazil, the world’s No. 1 shipper of chicken and beef, saw its first major closure with the halt of a poultry plant owned by JBS SA, the world’s biggest meat company. Key operations are also down in Canada, the latest being a British Columbia poultry plant.

While hundreds of plants in the Americas are still running, the staggering acceleration for supply disruptions is now raising questions over global shortfalls. Taken together, the U.S., Brazil and Canada account for about 65 percent of world meat trade.