In this section, “emergency” includes an emergency that results from fire, flood, riot, robbery, weather, or other cause. If an emergency exists in a political subdivision, the Governor may proclaim a day for the general cessation of business in that political subdivision. If an emergency exists as to a banking institution, the Governor: may proclaim a day on which the banking institution may remain closed; and shall limit the proclamation to the principal banking office and branch offices of the banking institution that the emergency affects.