Cuba's power grid collapses again. Why does this keep happening?

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's power grid collapses again. Why does this keep happening?
A woman prepares to catch a tossed frisbee during a massive blackout after a major power plant failed in Havana on Friday.

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.

(Image credit: Ramon Espinosa)