The answer to 'why is my rodent swarms' is that you likely have a serious rodent infestation in your home. Rodent swarms are a sign of a large population of mice, rats, or other rodents that have infested your property. Common causes include easy access to food sources, lack of effective pest control, and favorable nesting conditions.
Symptoms of a rodent swarm include seeing multiple rodents at once, finding droppings or nests in your home, hearing scurrying or scratching noises, and noticing damage to food, insulation, or other household items. If left untreated, a rodent swarm can lead to health hazards, property damage, and further population growth.