The answer to 'emergency electrical service making buzzing noise' is that a buzzing sound coming from an electrical panel or service indicates a potentially dangerous electrical issue that requires immediate attention from a licensed electrician. This could be caused by loose connections, overloaded circuits, or other electrical problems that could lead to fire or shock hazards.
It's important not to attempt to diagnose or repair the issue yourself, as working with live electrical systems can be extremely dangerous. Instead, you should shut off power to the affected area and contact an emergency electrical service provider right away. They can quickly identify the root cause and make any necessary repairs to restore safe, reliable power to your home.