Perhaps the eagle-eyed Rijkswaterstaat employee should receive an honorarium from the insurance companies and Gemeente Amsterdam.
Also “Operating staff also received extra training.” - just like a standard SaaS major incident wrap up…
But yes, flood damage is typically insured. Premium will vary ofc if your house is inside or outside a protected area.
My private insurance covers flooding at no additional cost and almost all home insurance covers it (maximums/deductibles are affected by insurance price of course but they are very reasonable).