Heat, humidity and pests: How to deal with flying cockroaches at home

In Mexico City, heat and heavy rain can push cockroaches from damp sewer and drainage systems into homes, particularly kitchens and bathrooms. Humidity gives the insects reasons to seek shelter, food and shade indoors.

The American cockroach, or Periplaneta americana, can grow to about four centimeters and has developed wings that allow short flights. The oriental cockroach is dark and winged but cannot fly, while the smaller German cockroach usually keeps its wings unused. Cockroaches can enter homes through wall cracks, unscreened windows, uncovered ventilation grilles and contaminated cardboard packaging.

Household hygiene guidance recommends sealing cracks, installing window screens and covering drains. Residents are also advised to remove crumbs, keep rubbish in airtight containers and ventilate bathrooms. Adhesive strips placed near appliances can help monitor infestations without synthetic pesticides, while diluted white vinegar and baking soda are cited as common cleaning remedies.

The guidance recommends specialized pest-control treatment when cockroaches appear during daylight hours.