Zeta Peralta

The island was plunged into darkness after a boiler broke at one of the country's largest thermoelectric plants.

Cuba's aging electrical system has been fragile for years, but the U.S.

has now enacted a fuel blockade that's thrown it close to collapse.

Cubans are cooking on the streets with firewood.

Public services are limited.

The government has announced reforms to its economic system.

Analysts say that was intended to encourage the U.S.

to ease its pressure on the government.

But President Trump showed no signs he was retreating.

He said he wanted to finish up with Iran before moving on to Cuba.

But he said it's a question of time before Cuba's government falls.

Ada Peralta, NPR News, Caracas.