The answer to 'why is my rat swarms' is that you likely have a severe rat infestation on your property. Rat swarms, or large groups of rats, are a sign of a major pest problem that needs to be addressed quickly. Rats breed rapidly and can quickly overrun a home or yard if left unchecked.
Common causes of rat swarms include easy access to food sources, lack of effective pest control, and favorable breeding conditions. Symptoms may include seeing multiple rats at once, hearing noises in walls or attics, and finding signs of rat activity like droppings or damage. To solve the problem, you'll need to remove food sources, seal entry points, and implement a comprehensive pest control plan, which may require the help of a professional exterminator.