Manila’s main airport was ordered shut down for 24 hours from Sunday to Monday and airlines canceled dozens of international and domestic flights. The military and national police, along with the coast guard and firefighters, have been put on full alert.

About 1,000 Covid-19 patients were moved to hospitals and hotels from tent quarantine and treatment centers in the capital and the northern province of Bulacan, Jalad said. More emergency shelters would be opened than usual to avoid congestion that can rapidly spark infections.