One day after Orange County supervisors voted to spend more than $70 million to house the homeless, residents in three prosperous cities expressed alarm about a proposal to set up “camp” shelters in their communities.

Besides creating permanent housing, the officials’ plans call for possible camps in Irvine, Laguna Niguel and Huntington Beach on county-owned land. The Irvine City Council voted unanimously late Tuesday to sue the county to stop the proposal.