The national power grid comes back on after Cuba’s 10 million people were plunged into darkness overnight.

Cuba has reconnected its power grid and brought online its largest oil-fired power plant, energy officials said, putting an end to a nationwide blackout that lasted more than 29 hours amid a United States move to choke off the island’s fuel supply.

After the country’s 10 million people had been plunged into darkness overnight, the Caribbean island’s national power grid had fully come back online by 6:11pm (22:11 GMT) on Tuesday. However, officials said power shortages may continue because not enough electricity is being generated.

In addition to cutting off oil sales to Cuba, US President Donald Trump has escalated his rhetoric against the Communist-run island, saying on Monday he could do anything he wanted with the country.

A US State Department official blamed the Cuban government for the grid collapse, calling blackouts a “symptom of the failing regime’s incompetence”.

Cuban President Miguel Diaz-Canel fired back at Washington, criticising its “almost daily public threats against Cuba”.

“They intend to and announce plans to take over the country, its resources, its properties, and even the very economy they seek to suffocate in order to force us to surrender,” Diaz-Canel wrote on social media on Tuesday night, shortly after power returned nationwide.

Cuba has yet to say what caused Monday’s nationwide grid failure, the first such collapse since the US cut off the island’s oil supply from Venezuela and threatened to slap tariffs on countries that ship fuel to the nation.

By midday on Tuesday, grid workers successfully fired up the Antonio Guiteras power plant, a decades-old behemoth that underpins the country’s power grid.

Daily blackouts

Electricity generation, hampered by dire fuel shortages and antiquated power plants, is still far below what is necessary to meet demand, providing scarce relief for Cubans already exhausted from months of blackouts.

Most Cubans, including those in the capital, Havana, were seeing 16 or more hours of blackout daily even before the latest grid collapse.

“It affects every aspect of our lives,” said Havana resident Carlos Montes de Oca, noting that the outages had thrown simple necessities such as food and water supply into disarray. “All we can do is sit, wait, read a book… otherwise the stress gets to you.”

Much of Cuba was overcast through the afternoon on Monday as a cold front neared the island, casting shadows on the solar parks that account for a third or more of daytime generation.

Cuba has received only two small vessels carrying oil imports this year, according to LSEG ship tracking data seen by Reuters on Monday. On Tuesday, a Hong Kong-flagged tanker that could be carrying fuel to Cuba resumed navigation after suspending its course weeks ago in the Atlantic Ocean, the data showed.

Cuba and the US have opened talks aimed at defusing the crisis, among the most acute since 1959, when Fidel Castro forced a US ally from power on the island.

Neither side has provided details of the ongoing negotiations, although Trump has portrayed Cuba as desperate to make a deal.

Cubans, no strangers to hardship, saw little choice but to stay calm.

“We still don’t have power at my house,” said Havana resident Juana Perez. “But we’ll take it in stride, as we Cubans always do.”