Residents across the Caribbean island of St. Lucia faced a sudden full-system power outage over the past weekend, after a rodent triggered an unexpected equipment failure that cascaded through the national electricity network, state power utility LUCELEC (St Lucia Electricity Services Limited) has confirmed. The incident originated on May 1, when a rodent interfered with an 11 kilovolt (11kV) circuit breaker located in LUCELEC’s Cul-de-Sac power distribution network, according to preliminary investigations by the company.
The unexpected fault immediately activated the network’s automatic protection systems, which are engineered to shut down the entire grid to prevent catastrophic, irreversible damage to major power infrastructure. Utility officials explained in an official public statement that while wildlife-related disruptions are rare events, they are classified as a well-documented inherent risk for power grids across the globe. To counter this threat, LUCELEC noted it has already implemented multiple overlapping layers of defensive safeguards designed to isolate local faults and prevent them from spreading to the broader transmission and distribution network.
Within 60 minutes of the fault occurring, technical teams completed initial safety inspections and system diagnostics, after which they began the process of restoring power to end users across the island. Service was brought back gradually for customers across all regions of St. Lucia, with full restoration completed in subsequent hours.
As part of the company’s standard post-outage operational protocols, LUCELEC has launched a full technical review of the entire incident. The review will systematically examine the sequence of events that led to the full shutdown, evaluate how the grid’s protection systems performed during the incident, and verify that existing risk mitigation measures functioned as intended. Findings from the assessment will be used to shape any additional upgrades or operational adjustments needed to boost the grid’s overall resilience and lower the probability of a similar full-system outage occurring in the future.
In its statement, LUCELEC issued a formal apology to all residential and commercial customers impacted by the unplanned blackout. The company reaffirmed its long-term commitment to delivering a safe, consistent, and resilient power supply to all St. Lucians, noting it will continue allocating capital toward infrastructure upgrades, enhanced system protection, and operational improvements to better serve the island’s population.