Cuba faced a complete power outage on Saturday, marking the third such incident in March, as the communist regime grapples with deteriorating infrastructure alongside a U.S.-enforced oil embargo.

The Cuban Electric Union, operating under the Ministry of Energy and Mines, initially declared a nationwide blackout without specifying the cause.

Subsequently, the union attributed the blackout to an unexpected malfunction at the Nuevitas thermoelectric plant located in Camagüey province.

“Following the failure, a chain reaction impacted the other operational machines,” detailed a report from the Ministry of Energy and Mines. The ministry responded by deploying “micro-islands” of generating units to supply electricity to essential services like hospitals and water systems.

Efforts to restore the power supply are ongoing, according to authorities.

In recent years, Cuba has frequently experienced power outages, both at the national and regional levels, due to the failing infrastructure. These issues are exacerbated by chronic fuel shortages leading to daily blackouts lasting as long as 12 hours, further destabilizing the power grid.

The last nationwide blackout occurred on Monday. Saturday’s outage was the second in the past week and the third in March.

The blackouts have a significant impact on the population, whose lives are disrupted by reduced work hours, lack of electricity for cooking and food spoilage when refrigerators stop working, among many other consequences. In some cases, hospitals have canceled surgeries.

President Miguel Díaz-Canel has said the island has not received oil from foreign suppliers for three months.

Cuba produces barely 40% of the fuel it needs to power its economy.

Cuba’s aging grid has drastically eroded in recent years.

But the government has also blamed the outages on a US energy blockade after US President Donald Trump in January warned of tariffs on any country that sells or provides oil to Cuba.

The Trump administration is demanding that Cuba release political prisoners and move toward political and economic liberalization in return for a lifting of sanctions.

Trump also has raised the possibility of a “friendly takeover of Cuba.”

Another reason Cuba has been struggling with dwindling oil is the removal of Venezuela’s leader, which halted critical petroleum shipments from the nation that had been a steadfast ally to Havana.

Trump has for months suggested Cuba’s government is on the verge of collapse. After a previous time Cuba’s electric grid collapsed, Trump told reporters he believed he’d soon have “the honor of taking Cuba.”