The phrase "multiple counties" means more than one area of land that is governed by their own local government within a larger region or state. Full definition
In 2011 alone, the state broke 34 heat records, 27 rainfall records, and experienced cases of extreme drought in multiple counties. (climaterealityproject.org)
Some districts follow county borders while others include parts of multiple counties. (politifact.com)
Based on his responses I believe he violated multiple county policies and asked him to resign, which he did verbally over the phone. (www2.erie.gov)