The arrests occurred in San Diego and Imperial counties, a region the federal government refers to as its San Diego area of responsibility. “I feel the temperature rising,” said Patrick Corrigan, a volunteer who monitors U.S. Immigration and Customs Enforcement activity at the federal courthouse in San Diego. A Department of Homeland Security spokesperson would not comment about whether more high-profile operations were planned for the San Diego area. In San Diego, federal immigration agents have clashed with protesters while arresting immigrants in the hallways of downtown courtrooms. The San Diego area of responsibility includes San Diego and Imperial counties whereas the Los Angeles area of responsibility includes Los Angeles, San Bernardino, Orange, Riverside, Ventura, Santa Barbara and San Luis Obispo counties.