What this data measures
The federal BAFU hillslope debris flow index map (Gefahrenhinweiskarte Hangmuren) highlights areas with elevated susceptibility based on slope, soil, and vegetation factors.
It is a national-scale indicator map and not a local engineering risk assessment.
How to interpret it
An address in a high-susceptibility area means the landscape factors are conducive to rainfall-triggered hillslope debris flows.
It is a screening indicator, not a prediction that a flow will reach a specific building.
Increasing rainfall intensity under climate change makes this hazard more relevant than historical records alone may suggest.