Sudden rises in water level are due to imperative technical requirements or natural phenomena. They may occur :
- even in fine weather
- at any time of the day or night
- without any warning signs
- many kilometres downstream of the installations (water intakes, dams)
- even in dry torrents
Hydroelectric operators decline all responsibility in case of accident
![](https://avpee.ch/wp-content/uploads/2022/05/montage-crue-1-300x222.jpg)