Flood warning in Hanover: Keep an eye on water levels on the Leine!

Flood warning in Hanover: Keep an eye on water levels on the Leine!

Today, June 21, 2025, the current water levels of the Leine and Ihme in Hanover will be monitored in order to identify possible flood risks at an early stage. The Leine, which originates in southern Eichsfeld and flows into the Aller north of Schwarmstedt, flows through the city and is a central watercourse for the region. The Ihme, which rises in the Deister foreland, also plays its part in the formation of floods before it flows into the Leine north of Hanover. Important information about water levels is essential for the city's citizens, especially at times when rainfall is increasing.

Current values ​​recorded at 21:00 CEST today show that the water level of the Leine in Herrenhausen is 79 cm, which is 49% below the mean level of 155 cm. In Neustadt the level is 172 cm, which means it remains 19% below average. A value of 76 cm was measured for Schwarmstedt, which is also 50% below the average. The trend in Herrenhausen is increasing, while the levels in Neustadt and Schwarmstedt remain stable. All of this makes it clear that there is currently no threat of flooding, but developments over the next few days remain exciting. Wetteronline has provided current data on this.

Flood warnings at a glance

In Lower Saxony there are clearly defined reporting levels for floods, ranging from level 1 to level 4. At level 1, water occasionally overflows the banks, while at level 4, major flooding occurs in built-up areas, which requires the use of water defenses and dams. These warnings can be issued by various bodies, such as federal, state or fire departments, often by the flood control center. Warning channels are diverse and include radio, television, sound trucks, sirens and modern digital platforms to ensure that all information can be disseminated quickly and accurately.

It is noteworthy that flood events in recent years are also linked to changing climatic conditions. According to the flood atlas from BKG, summer temperatures are increasing, leading to more intense but less frequent precipitation. These changes can cause damage, as previous flood events show. Data on current flows, precipitation values ​​and forecasts are essential for analyzing such events.

Nowadays, authorities and the public use the flood atlas, which is accessible free of charge and bundles relevant data on a digital map. However, this platform does not replace local warnings from the relevant authorities, whose responsibility remains essential. Every citizen is required to remain vigilant and to regularly inform themselves about the updated water levels and possible flood developments in order to be able to take measures in good time.