Authority for the Environment, Climate, Energy and Agriculture

Avoid damage caused by heavy rain

The Free and Hanseatic City of Hamburg, together with HAMBURG WASSER, is working to protect people and buildings from flooding caused by extreme rainfall.

Important notes

Please note

Your property or building cannot be protected from heavy rain by a single measure, but only by a sensible combination of protective devices that take the individual location and shape of the property into account.

Some protective measures, such as securing against backflow or upstands, are mandatory for you if you own land or a house. If these are missing, your drainage system does not comply with the Hamburg Wastewater Act or the generally accepted rules of technology. Insurance companies can then rightly limit or completely refuse to pay compensation.

In the event of heavy rain and the resulting flooding, residential building insurance is not sufficient. Damage caused by heavy rain can only be insured with additional natural hazard insurance.

Service description

Heavy rain refers to extreme precipitation in which a large amount of rain falls in a very short period of time. However, the amount of water can exceed the capacity of the sluice network, ditches and bodies of water. The water then threatens to flow onto properties and enter buildings. The water sometimes causes considerable damage, which is why it is important that you as the owner of a property take appropriate protective measures to prevent this.

With the aim of developing sustainable ideas and concepts for dealing with rainwater, the Authority for the Environment, Climate, Energy and Agriculture (BUKEA) and HAMBURG WASSER (HW) have jointly launched the RISA – RainInfraStructureAdjustment project. The aim is to reduce the risk of flooding during urban planning. On the corresponding website you will get an initial overview of how you can effectively protect your property and building against damage yourself.

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Address and contact information


Authority for the Environment, Climate, Energy and Agriculture
Neuenfelder Straße 19 21109 Hamburg

Facility info

Mensch in einem Rollstuhl Accessible

We have a limited number of customer parking spaces. To reserve a parking space, please contact our receptionist by e-mail at or by telephone on +49 40 428 40 - 50 50. Our working hours are: Monday to Thursday from 8:00 a.m. to 3:15 p.m , Friday from 8 a.m. to 1:30 p.m.

Public transport

S3/S31 Wilhelmsburg, Bus 13/151/152/154/156//155/252 Inselpark

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