Watt-Evans, Lawrence. "Storm Trooper"
Summary: Reality storms occasionally swap pieces of Earth with pieces of alternates, and New York sets up a Discontinuity Control Squad.
Published: In Isaac Asimov's Science Fiction Magazine, January 1992 and Crosstime Traffic, Ballantine/Del Rey 1992 (0345373952).
Original in: English.
Translation: German by Jakob Leutner as "Sturmtruppen", in Isaac Asimov's Science Fiction Magazin 40 (ed. Friedel Wahren), Heyne 1992 (3453061993).