There are two common rats in the southwest area of B.C., both sociable animal and found around food sources. First there is the Norway rat that burrows in the ground and is generally around crawl spaces, attics, clutter, woodpiles, garbage, and piles of debris. Then there’s the roof rat that likes to climb and tends to live in trees, roofs or attics. So how do we get rid of rats? Rats are very adaptable animals, as long as there is food and water they can live in almost every location. The most important thing is to cut off their food sources, then reduce all clutter in and around your house. If they are getting into your home then removing the rats entry points is important, called exclusion. And finally, to eliminate them we use rodenticides, snap traps, live traps and tracking power.
https://gogreenpestcontrol.ca/lower-mainland-rats/
https://www.linkedin.com/pulse/lower-mainland-rats-randy-bilesky/?published=t