IRVINE, Calif. -- A house of horrors in Southern California overrun with rats has been declared a public nuisance by the city of Irvine as neighbors grow frustrated with rodents roaming around freely.

Rat populations are increasing nationwide, and California is not exempt from the issue, which stems from warmer climates, urbanization and recent legislation, according to experts. The states facing ...

SAN FRANCISCO – Rodent expert Roger Baldwin used to get fewer than one yearly inquiry about rat issues during most of his extended stint at the University of California, Davis, where he’s a professor ...