Which of the following is considered a ground emergency?

A fuel spill is classified as a ground emergency because it poses immediate risks to personnel, equipment, and the environment. Fuel spills can lead to fires or explosions, especially in proximity to heat sources or ignition points. Managing a fuel spill involves evacuation procedures, containment, and cleanup to mitigate its effects and ensure the safety of all individuals in the area.

In contrast, while power outages can disrupt operations, they do not inherently pose the same level of immediate danger as a fuel spill. Aircraft fires, while critical incidents, pertain more to airborne emergencies when they occur in flight. Severe weather pertains to environmental conditions that can affect operations, but does not directly represent a situation requiring immediate ground response like a fuel spill does.