Large rat populations can have a damaging effect on cities. Researchers found that living with rats " impacts people and their psyche."

A new study finds that rat infestation in many of the world’s cities appears to be soaring, especially in Washington.

Global warming is helping rats thrive in major cities around the world, with Washington DC seeing the fastest growth in rats

A new study of cities across the globe has found a link between climate change and larger increases in the urban rat population.

A new study has revealed how rat populations have "significantly" increased over the last 10 years, which has caused major cities across the globe to battle a 'war of rodents'

Almost every one of the world’s cities is rat infested. In some, like New York, there are teams that fight them. They have large budgets, but are only partially successful. *Urban Climate Challenges *New York’s Floods *How Will The South Get Air Conditioning According to ScienceAdvance,

The study analyzed records of rat sightings in 16 cities over an average period of twelve years, examining public rat sighting and inspection data.