Yesterday after maintenance shutdown of a 400kV transmission line in Nordrhein-Westfalen, Germany, led to an emergency shutdown of private customers in many areas of Europe to prevent a full blackout. Several areas of Germany, France, Belgium and Italy were without power for 30 minutes, others experienced brownouts, areas in Austria lost power for 13 minutes.
In Vienna we had a severe brownout, followed by a noticeable overvoltage (very bright incandescent lights) and after some 15 minutes a dip back to normal again (which most people probably wouldn't have noticed at all, it just felt like the dim on startup surges you're used to here in Vienna).
