Floods in Brno by address
Most of Brno lies above the water, but not along the Svratka, the Svitava and smaller streams. Where a big flood would reach, which neighbourhoods it affects most and how to check a specific building.
Where Brno is at risk of floods
Two rivers flow through Brno, the Svratka and the Svitava, which meet in the south of the city, plus smaller streams. The flood zone shows where a 100-year flood would reach: a flood that comes once a hundred years on average, but can just as well come two years in a row.
8,1 % of Brno's addresses (5 024) lie in the 100-year flood zone.
Neighbourhoods with the largest share of addresses in the flood zone
The highest share of addresses in the flood zone is in Komárov (99 %), Horní Heršpice (38 %) and Husovice (38 %). 20 Brno neighbourhoods have addresses in the flood zone; in most of them it is only the buildings by a river or stream.
Brno neighbourhoods most threatened by floods
- 99 % of addresses in a flood zone Komárov Brno-jih
- 38 % of addresses in a flood zone Horní Heršpice Brno-jih
- 38 % of addresses in a flood zone Husovice Brno-sever
- 35 % of addresses in a flood zone Staré Brno Brno-střed
- 29 % of addresses in a flood zone Zábrdovice Brno-střed
- 22 % of addresses in a flood zone Židenice Brno-Židenice
- 19 % of addresses in a flood zone Trnitá Brno-střed
- 18 % of addresses in a flood zone Maloměřice Brno-Maloměřice a Obřany
- 15 % of addresses in a flood zone Starý Lískovec Brno-Starý Lískovec
- 15 % of addresses in a flood zone Jundrov Brno-Jundrov
Flood protection
Along the Svratka and the Svitava, Brno is gradually building flood walls and embankments and widening the riverbeds. The flood zone map we use shows where a 100-year flood would spread; where new protection already stands, the real risk may be lower. For a specific building, ask the district office how it is protected.
How to check a specific address
For every Brno address we show whether it lies in the 100-year flood zone. You will find the same figure for every neighbourhood.
What to ask when buying or renting
- Floor: in a flat on a higher floor, a flood reaches you mainly through the cellar, the lift and power cuts. The ground floor and basement are most at risk.
- How the building fared in the last big flood: the owner or the neighbours usually know. Water marks often show in the cellar.
- Insurance: in a flood zone, insurance can be more expensive, or the insurer may offer it with an exclusion. Ask before you sign.
- Groundwater and cellars: even outside the flood zone it pays to know whether the building has backflow valves on the sewer.
Frequently asked questions
How many Brno addresses lie in the flood zone?
5 024 addresses lie in the 100-year flood zone, that is 8,1 % of all Brno addresses. 20 Brno neighbourhoods have addresses in the flood zone.
Which Brno neighbourhoods are most at risk of floods?
The largest share of addresses in the flood zone is in Komárov (99 %), Horní Heršpice (38 %) and Husovice (38 %).
How do I find out whether a building is in the flood zone?
Enter the address in Check an address: for every Brno address we show whether it lies in the 100-year flood zone. You will find the same figure for every neighbourhood.
