The North Sea flood of 1962 was a natural disaster affecting mainly the coastal regions of West Germany and in particular the city of Hamburg in the night from 16 February to 17 February 1962. In total, the homes of about 60,000 people were destroyed, and the death toll amounted to 315 in Hamburg. The extratropical cyclone responsible for the flooding had previously crossed the United Kingdom as the Great Sheffield Gale, devastating the city of Sheffield and killing nine people. Causes The flood was caused by the Vincinette low-pressure system, better known as the Great Sheffield Gale, approaching the German Bight from the southern Polar Sea. A European windstorm with peak wind speeds of 200 km/h pushed water into the German Bight, leading to a water surge the dykes could not withstand. Breaches along the coast and the rivers Elbe and Weser led to widespread flooding of huge areas. In Hamburg, on the river Elbe, but a full 100 km away from the coast, the residential areas of Wilhelmsburg were the most affected. During a new moon and solar eclipse, an extremely rare grand conjunction of the classical planets occurs (it includes all five of the naked-eye planets plus the Sun and Moon), all of them within 16° of one another on the ecliptic. This (and, of course, the high tide) had some effect on the strength of the flood, but not such a great one and the flood was mainly caused by the reason above. On Thursday 15 February, German authorities published the first storm warning for the North Sea with wind speeds up to 9 Beaufort. A severe storm warning followed the next day, with a predicted gauge of 3 metres above normal, which was a level the dykes could withstand. The severe storm and the flood it caused in the last hours of 16 February affected the dykes more than predicted and led to some 50 breaches before officials raised the alarm for Hamburg. At this time of the day, most city offices were closed, which slowed the notification of the population. Civil protection plans were not implemented yet. Due to telephone landline breakdowns, warnings could not be forwarded from coastal to inland emergency offices. Breakdowns in alarm siren lines and electricity lines severely affected the warning system. Radio amateurs had to establish emergency operations to support emergency services as a means of communication. Around midnight,