Climate change is visible: extreme precipitation is increasing
Recent analyses show that climate change is already manifest in the statistics on extreme downpours. The frequency of extreme precipitation has already increased by a factor of two to five compared to the 1950s, and it will increase even further in the future: by a factor of up to five by 2050, and by a factor of up to ten by 2085 vis-à-vis the current situation (based on the KNMI’14 climate scenarios). How this will affect the probability of waterlogging differs for each individual area, but by and large, the probability of waterlogging is increasing. Waterlogging can be caused by prolonged precipitation (usually in winter), but also by short, extremely severe precipitation (more often in summer). The impact of these two types of precipitation differs and also depends on the location hit by the precipitation: whether in rural areas or in a city.The impact may be so large that local residents or businesses sustain damage despite the preventative measures taken by the government authorities. The district water board and the municipality are not accountable for such damage. Although residents and businesses have a responsibility of their own, in many cases they are insufficiently aware of the risk and of measures to limit such risk. Consequently, not many of them are insured against damage caused by waterlogging. Furthermore, such damage is not fully covered by insurance companies, nor does the central government disaster fund provide a comprehensive safety net.