Pest control in St. Louis follows water. Mosquitoes rise after river rains leave saucers in alleys, gutters, and low yards. Termites use damp soil against brick and old sill areas. Ants trail from wet mulch. Roaches move through multi-family kitchens that share a wall. Mice and rats use alley gaps, catch basins, and foundations. A storm that opens a soffit gives squirrels a door. Say what you saw and on which floor.
Droppings behind a stove, rub marks at a sweep, and night noise in a ceiling are the map. Mud tubes and swarmers are a different report from a mouse. Carpenter ants in a wet soffit mean soft wood after the rain found it. Silverfish in a clammy garden bath mean moisture. Do not pack every masonry gap; some weeps let the wall dry. Pigeons on a parapet load the edge with debris that holds damp. Say if that edge is yours.
A two-family building can make one kitchen a useless place to stop. Say if the neighbor hears them. Baits have to live with pets and children. Activity after every hard rain points at moisture and an entry, not a single visitor. Basement backup water will keep pests even when the sink is clean. Mention the water. Daytime roaches and nighttime attic animals should not be mashed into one sentence.
Usual doors are the rim, the alley foundation, the dryer vent, and gaps where stacks leave. If you plugged one hole and they returned, name it. A return means another opening. Sealing a parapet weep or an attic vent without a plan can trap the damp these storms deliver. If you are already wet from a roof leak, say so. The pests and the water are often the same call only at the start.
Lead with the pest, the floor, and whether the last rain left standing water. St. Louis brick gives pests seams. Call the number on this page.