The Storm of 401 was a freak blizzard which rolled in from the Serenic Ocean. Blame was initially laid on a Feyndraigish weather experiment gone haywire, but representatives from Feyndraig denied responsibility and aided Aden in reconstruction efforts.
The city of Tolikra was especially hard-hit by this disaster, with a storm surge of 5 feet, much of the city was wiped out, and what wasn't wiped out was severely damaged.