Thomas Woldbye, the airport's chief executive, characterized the disruption as "unprecedented," highlighting the power loss comparable to that of a midsize city. He indicated that while backup systems were operational, they proved insufficient to maintain normal operations. "We expect to be back in full operation, so 100 percent operation as a normal day," he stated optimistically, looking ahead to Saturday.

As investigators began to assess the situation, British counterterrorism police were put in charge of the inquiry into the incident's cause. Initial investigations by the Metropolitan Police revealed that they do not consider the fire suspicious, though inquiries will continue.

This incident prompted a review of the airport's dependency on a single electrical substation for power, raising questions about its resilience and security amidst increasing global air travel demands. Passengers were left scrambling as airports worldwide saw ripple effects from the incident, emphasizing the critical role that Heathrow plays in international air travel. The full economic impact of the disruption is still being assessed as the airport works to return to normal operations.