HAVANA, Aug 2, 2026 (AFP) - Havana and other parts of western Cuba were plunged into darkness Saturday due to the country's latest power grid failure, the state-run electric company announced.

Five of 15 provinces had no power due to a "partial collapse" of the electricity grid at 6:07 pm (2207 GMT), Cuba's UNE said on X.

Cuba is reeling from its worst economic crisis in decades -- one made worse by the fuel blockade imposed by US President Donald Trump in January as part of a pressure campaign aimed at ending six decades of communist rule.

UNE says the fuel shortages have made the national grid more susceptible to outages and made the use of emergency generators -- which typically run on diesel fuel -- all but impossible.

In recent weeks, some of the blackouts have lasted more than 30 hours in Havana, and for several days in other parts of the island nation, which has a population of 9.4 million people.

Since the start of 2026, Cuba has experienced five nationwide blackouts, three of them in July within a period of 10 days. Since late 2024, there have been 10 such total power outages.

Relations between Washington and Havana have been tense since the start of the year, especially since US forces snatched Venezuelan leader Nicolas Maduro from Caracas in early January and brought him to the US to face federal charges.

Maduro had long been a staunch ally of Cuba.

Washington has authorized the arrival of only one Russian tanker -- carrying 100,000 tons of crude -- which came in March. Those reserves have since been exhausted.

In addition to its oil blockade, the Trump administration has ramped up sanctions against Cuban state-owned businesses, prompting many foreign businesses to suspend operations in the country.

The United States has also indicted former president Raul Castro, brother of the late revolutionary leader Fidel Castro, over the downing of two civilian planes three decades ago.

In late June, Cuban Foreign Minister Bruno Rodriguez said "no progress" had been made in months of bilateral discussions.