Flood warning in Hanover: Leine level reaches critical values!

Flood warning in Hanover: Leine level reaches critical values!

On August 28, 2025, the flood wave will roll over Hanover. The focus is on the two main rivers, the Leine and the Ihme. The Leine, which rises in southern Eichsfeld, and the Ihme, which arises in the Deister foreland, are not only defining elements of the landscape, but are also constantly in the spotlight for flood warnings. These can quickly become an exciting and at the same time worrying topic for residents, as the current situation shows. The Leine flows into the Aller north of Schwarmstedt after passing Göttingen and Hanover.

The line level in Hanover-Herrenhausen is closely monitored. According to reports from haz.de are the data defined as “Mean Low Water” (MNW) and “Mean High Water” (MHW), average values ​​determined over specific time periods. For the leash at Herrenhausen, the MW is 180 cm, while the MHW is 516 cm. The highest flood ever recorded was 644 cm on February 10, 1946. These values ​​are not just statistics; they are an important indication of the accessibility of the water levels.

Flood Warnings

The reporting levels for floods are clearly defined. They range from level 1, where isolated flooding occurs, to level 4, where major flooding in built-up areas is necessary. Recently, there have been changes in the weather that can lead to floods more and more often. With the increasingly hot summers in Germany, as also stated in the flood atlas BKG is described, it becomes clear that these extreme weather events are increasing, even if they occur less frequently.

In addition, the warnings fall under the jurisdiction of the Civil Protection and Disaster Relief Act. These can be issued by various bodies, such as the police or fire brigade, and are often done via various channels, including radio, television and social media. Residents must therefore be vigilant, because where there is water, there will also be challenges in the future.

The flood atlas and its significance

An interesting tool in this topic is the flood atlas, which not only provides current flows and precipitation values, but also enables forecasts for the next few days. This is an important database that is particularly valuable for authorities. According to that Flood Atlas A lot of things are visualized here to make the dangers more tangible. The possibility of using digital geodata is a real advance in understanding such situations better and being able to react to them.

The next few days will show whether the warnings come true - not just in Hanover, but also worldwide, such as here in Redondo Beach, California, where the tides play a certain role today. According to the reports, the next high water mark in Redondo Beach is 5.22 feet at 12:43 p.m., which highlights the importance of the forces of nature: although the tides there are less dramatic, they can still be disruptive.

Having a handle on natural events remains the motto in Hanover. It is important to be vigilant and keep an eye on the water levels. The weather situation is changing and the city also has to adapt to it.