Section 1983 Liability
Section 1983 of the Civil Rights Act of 1871 allows citizens to sue persons who, under color of state law, deprive them of their constitutional rights. Section 1983 actions can be brought against state officials in their personal capacity, but not in their official capacity. City and county and other nonstate officials can be sued in their official capacity, which allows damages to be obtained from the governmental entity, and in their personal capacity.
Section 1983 applies to anyone who acts under color of state law. It reaches everyone working under the authority of the health department, irrespective of their employment status, and can even be applied to volunteers. It does not provide for vicarious liability, so public health officials can be held personally liable only for their own actions, not those of subordinates. To prevail, the plaintiff must prove that the official's conduct violates clearly established statutory or constitutional rights that a reasonable official should have known about. If the official is mistaken about the law but had no reason to know that the actions were improper, or is acting under a law later declared unconstitutional, there is no liability. The courts also require that persons bringing 1983 actions show significant harm as well as improper conduct. This is unusual in public health restrictions because they are easily reviewed and corrected in postdeprivation proceedings before the plaintiff is harmed.
Section 1983 actions must allege that the defendant violated the plaintiff's rights under the Constitution or certain federal laws. Most public health cases allege violations of the constitutional rights of equal protection or due process. Equal protection claims arise from differential treatment that is motivated by improper discrimination, especially discrimination based on race, ethnicity, or religion. Refusing to issue a license or permit because of personal animus against the applicant could also be an equal protection violation, unless there were other rational grounds for the refusal.
Due process claims arise when the public health official does not give the party the procedural safeguards provided for in the law. If a statute required 30 days' notice and an opportunity for a hearing before destroying a dangerous building, then it could be a  due process violation to destroy the building without notice. If the defendant has complied with applicable statutes, the plaintiff can claim that the Constitution requires more process than the state or local law provides. Thus, if the law provides only 24 hours' notice,  the court may find that although the defendant complied, the notice period was not long enough. Claims are sometimes filed because public health officials  take action without a predeprivation (prior) hearing.  If the action is authorized by statute, or the court finds that waiting for a hearing would endanger the public,  the court will usually dismiss the claim. Thus, a building that is partially destroyed by fire may need to be destroyed at once, without notice or hearing because  of the threat it poses.