U.S. Embassy in Havana Warns After Nationwide Cuba Blackout, Updates Travel Guidance

The U.S. Embassy in Havana published a Security Alert on March 4, 2026 via its social media after a large-scale disconnection at 12:41 p.m. left areas “from Camagüey to Pinar del Río,” including the Havana metropolitan area, without electricity. En Cibercuba reported the Embassy warned “there is no information on when electrical service might be restored in the western part of the country,” and that the alert included an updated set of travel and safety recommendations for U.S. citizens.

Regional authorities, as reported by En Cibercuba, attributed the March 4 disconnection to “the unexpected shutdown of the Antonio Guiteras Thermal Power Plant,” a claim the outlet credited to Cuban regime authorities. The Embassy’s notices and prior posts instead emphasize the systemic problem: “Cuba’s national electrical grid is increasingly unstable and prolonged scheduled and unscheduled power outages are a daily occurrence across the country to include Havana. Outages affect water supply, lighting, refrigeration and communications,” language published on the Embassy’s Facebook page on February 3, 2026.

Operational impacts cited in Embassy messaging and archived Embassy material are immediate and practical. The Embassy site documented that “Many large businesses, hotels, hospitals, and institutions use generators during power outages. However, they may not be able to maintain their services should an extended outage occur as fuel available remains inconsistent.” The February Facebook post’s Spanish translation also flagged fuel shortages that are “affecting transportation and resulting in long lines at gas stations,” and urged people to “Take precautions by conserving fuel, water, food and mobile phone charge, and be prepared for significant disruption.”

The March 4 alert follows a string of major failures the Embassy has catalogued. The Embassy’s March 15, 2025 Security Alert recorded that “On March 14, 2025, Cuba’s entire electrical grid shut down after the failure of a one of the country’s substations that led to a nationwide power failure,” and noted there “have been multiple nationwide power outages since October 18, 2024.” That 2025 posting also warned “There are reports of cellphone and internet outages,” a continuity of service risk reiterated in the March 4 social-media posts.

For travelers and U.S. citizens on the island, the Embassy reiterated its standard precautions and specific next steps: “Enroll in the Smart Traveler Enrollment Program (STEP). Sign up to receive safety and security alerts and other local updates while abroad. Visit Travel.State.gov for More Information.” The Embassy also advised monitoring local sources, including daily updates published by Unión Eléctrica (UNE) and UNE’s social media accounts, and to follow local media for the latest information.

Secondary outlets including Cubaheadlines and social feeds amplified the Embassy alert in the days following March 4; an Instagram snippet framed the event as a “Nationwide Blackout Deepens Crisis Across Cuba.” The Embassy’s February Facebook post showed visible engagement (“View all 16 replies”), underscoring public concern.

As the Embassy warned on March 4, “there is no information on when electrical service might be restored in the western part of the country.” With repeated outages since October 2024 and generator fuel inconsistent, U.S. citizens and travelers should expect continued disruption and follow Embassy STEP updates and UNE communications for restoration timelines.