The Gread Floods were a set of floods that affected most of Halcann during the year 1 AA, being caused by the Day of Ashen Skies. The floods not only caused the overflow of most of Halcann's major rivers, but also several coastal areas were sunk or ravaged by tsunamis.
Cannor[]
The Damesear peninsula became an island after the eastern isthmus was submerged. The city of Damenath was half-flooded and a section of it sank into the Dameshead. The floods also destroyed the lagoons in the western Damescrown, creating the Floodmarshes.
The western coast of Lencenor is pushed back, losing land to the sea. One of the losses here is a portion of the city of Portnamm.
The South Citadel, one of Balgar's Wonders, sank into the ground and was mostly submerged in Lake Silvermere.
Bulwar[]
The Suran, the Buranum, and other rivers flooded, destroying or damaging several cities. The Buranum, which flowed into the Bay of Mirrors, changed and merged with the Suran in the future location of Medurubar.
The island of Azkaeliš was destroyed and only the highlands remained above sea level as the modern Pír-Aíl. Takilubad, the Purple Islands, sank alongside the western half of the Drolas peninsula.
The lowlands of Kuzaram and the eastern part of the Drolas sank, expanding the narrow Gulf of Glass, with some remaining highlands forming the Glass islands.
The Yametšes peninsula became an island, and the lands east of Ovdal Tûngr sank into the Divenhal.
Sarhal[]
The Mother's Sorrow overflowed, nearly bringing Kheterata to its destruction. The Eliznan peninsula became an island, and remained uninhabited until its settlement by the Sun Elves.
The homeland of the Taafi people of West Sarhal collapsed into the sea, forcing the survivors to become nomads.