The answer to 'emergency electrical service making buzzing noise' is that a buzzing sound coming from your electrical service panel or other electrical equipment is usually a sign of a serious issue that requires immediate attention from a professional electrician. This could be caused by a loose connection, faulty wiring, or a problem with the electrical components themselves.
Buzzing noises can indicate a potential fire hazard or risk of electrical shock, so it's important not to ignore them. Attempting to diagnose or repair the issue yourself could be extremely dangerous. The best course of action is to immediately shut off power to the affected area and call an experienced, licensed electrician to inspect and resolve the problem as soon as possible.