Columbia subject headings:
Natural disasters--Political aspects--Rome.
Rome--History--Empire, 30 B.C.-284 A.D.
Harvard subject headings:
Emergency management--Rome--History.
Emperors--Rome
Environmental disasters--Rome--History.
Natural disasters--Rome--History.
Rome--History--Empire, 30 B.C.-284 A.D.
Rome--Politics and government--30 B.C.-284 A.D.
Princeton subject headings:
Natural disasters--Political aspects--Rome.
Rome--History--Empire, 30 B.C.-284 A.D.