A city that experiences an emergency or an urgent public necessity may conduct a meeting without providing the 72-hour notice requirement that is generally required to conduct a meeting under the Open Meetings Act. An emergency or urgent public necessity exists only if immediate action is required because of: (1) an imminent threat to public health and safety; or (2) a reasonably unforeseeable situation. See Tex. Government Code §551.045(b). The sudden relocation of a large number of residents from the area of a declared disaster to a governmental body’s jurisdiction is considered to be a reasonably unforeseeable situation for a reasonable period immediately following the relocation. Id. at §551.045(e).