A comprehensive study published in Science Advances has linked climate change, specifically rising temperatures, to significant increases in rat populations across major cities. The study observed rat sighting reports from 16 cities, finding that 11 cities experienced rising complaints. Washington, D.C. led the growth, followed by San Francisco, Toronto, New York City, and Amsterdam. The findings suggest that warmer winters allow rats to forage and reproduce more effectively. Experts advocate for preventative measures focusing on waste management and community awareness rather than solely lethal control methods.