A widespread power outage affected Havana and the western provinces of Cuba, including Mayabeque to Pinar del Rio, on December 3, 2025. The U.S. Embassy in Havana issued a security alert to inform American citizens about the situation. According to Cuban state media, the cause of the electrical grid collapse and an estimated timeline for restoration remain unclear.
The embassy noted that emergency services are expected to continue operating despite the blackout. However, reports indicate disruptions in cellphone and internet connectivity across affected areas.
Cuba’s electrical infrastructure has experienced increased instability recently. On December 1, Cuba reported its lowest energy generation since 2022. Multiple nationwide blackouts have occurred since October 18, 2024. Power cuts—both scheduled and unscheduled—are now happening more frequently and lasting longer throughout the country.
Facilities that rely on generators may face challenges maintaining services if outages persist because fuel supplies are unreliable. The U.S. Embassy advised citizens currently in Cuba or those planning travel to monitor local media for updates and make appropriate preparations.
The embassy recommended several precautions:
- Review daily updates from Unión Eléctrica (UNE) through their official channels.
- Keep in contact with family and friends.
- Charge mobile devices and battery banks.
- Ensure flashlights and spare batteries are easily accessible.
- Maintain stocks of nonperishable food and water.
- Prepare alternative solutions for medical needs that depend on electricity.
For assistance, U.S. citizens can contact the embassy at +(53) (7) 839-4100 or via email at acshavana@state.gov. Additional resources include following embassy social media accounts or subscribing to consular information through WhatsApp at https://whatsapp.com/channel/0029VbBWEpNCsU9TsOaCjm3K.
Travelers are also encouraged to enroll in the SMART Traveler Enrollment Program (STEP) for security updates.