The Cuban government has announced emergency measures to slash electricity demand, including suspending classes, shutting down some state-owned workplaces and canceling nonessential services. Officials said that 1.64 gigawatts went offline during peak hours, about half the total demand at the time.

Cubans expressed alarm at the situation and one resident said they felt the country had reached the “bottom of the barrel.”

Millions in Cuba faced another morning without power on Sunday following a third partial grid failure in two days, intensifying a crisis that has left residents struggling with blackouts and shortages. The latest collapse affected the western provinces, including Havana, where the entire capital was plunged into darkness overnight.