On the 10th of August, 1937, over half of the agricultural land in Simadalen was submerged by the river. The damage to roads and houses was also catastrophic. This was the most destructive flood ever recorded in Hordaland.
Freezing and thawing are processes that influence plant cover, move enormous blocks, stretche long mounds of earth, break open bedrock and create patterns in stone and earth.
Solskinstjørni in Osa, just above Haugen farm in Norddalen, is visible only now and again, seemingly always for a period of good weather. Then it disappears abruptly, but its disappearance is not connected to weather conditions.
The Vosso is Hordaland's main artery, she has never run more richly than in our times, and no other river in western Norway carries so much water. The increase in the amount of water comes mainly from hydropower development, due to the transfer of water from other water systems. Climate change can also be a reason that the Vosso carries more water than before.