The first disaster movie made in Norway and Scandinavia.
Such a disaster has in fact happened in Tafjorden, another side arm of Storfjorden, north of Geirangerfjord. On April 7, 1934 a huge chunk of mountain broke off, fell 700m into the fjord and created a 62m high tsunami which swept away two villages, killing dozens.
Norway has about 5 mill. inhabitants and The Wave (2015) sold 832,649 admissions, therefore about every 6th Norwegian saw it in a cinema.
Sold over 141.000 tickets in Norway on the first weekend of release, the 3rd best result ever for a Norwegian film.[2015]