The answer to 'emergency electrical service sparking' is that this is a serious electrical issue that requires immediate attention from a professional electrician. Sparking or arcing in your electrical system can indicate a dangerous short circuit or other major problem that could lead to a fire or electrical shock hazard.
Some common causes of emergency electrical sparking include old or damaged wiring, overloaded circuits, water damage, and loose connections. Symptoms may include flickering lights, buzzing or sizzling sounds, burning smells, and visible sparks or arcing. Attempting to troubleshoot or repair this yourself can be extremely hazardous, so it's crucial to evacuate the area and call an emergency electrician right away.