Heat and rising water levels flush the rats out of their hovels deep underground and force them to look for nests closer to homes. When incoming waters force them through the sewers Rodents keep moving, sometime right past the trap and into toilet bowls. Sealing vents, windows, garage door gaps, structural gaps and floor drains can keep rats from entering home or commercial business building. Smaller rats can fit through holes as large as a quarter in diameter.
Rats love an easy bite, and bird feeders are a major attraction. By emptying these out, Removing any source of food is a strong deterrent to local rat and mice population. The same goes for garbage and compost piles. If these are accessible at all, rats will get to the food sources and multiple in great number in a short period of time. Inspect these receptacles for holes, weak spots, or entry points and patch them up. Don’t leave pet food outside either.