The Cuban government had just announced emergency measures to reduce electricity use — then the power went out across the entire nation.

Cuba's power grid has ground to a halt for a second time in as many days, leaving 10 million on the island without power and the Caribbean island in a growing sense of crisis.

Cuba was left in darkness on Friday when its largest power plant failed, prompting the government to largely shut down the island nation of 10 million people. "There will be no rest until (power) is restored,