Rainfall in the Bay Area often brings relief from dry conditions, but it also triggers a noticeable increase in pest activity. Homeowners and business owners frequently report ants, spiders, rodents, and other pests appearing seemingly overnight after a storm. This surge is not random. Rain fundamentally changes pest environments, forcing insects and animals to adapt quickly, and homes often become the most attractive refuge available. Understanding why pests spike after rain can help Bay Area residents recognize early warning signs and take action before a minor issue becomes a full infestation.
Winter is one of the most critical times of the year for commercial kitchen pest control. As temperatures drop, pests such as rodents, cockroaches, and flies move indoors — directly into the warm, food-rich environments of restaurants, cafés, bakeries, bars, food trucks, and commissary kitchens.
As temperatures drop and the days get shorter, many Bay Area residents notice an unwelcome change around their homes. . .the sound of scratching in the walls, droppings in the garage, or gnaw marks near food storage.