Floods in Hanover: Rapid stands in view - what you need to know!

On May 8, 2025, several sources report on the current levels of the leash in Hanover. The two main flows of the city, the leash and the Ihme, play a central role in flood surveillance. The leash rises in the southern Eichsfeld and flows north of Schwarmstedt into the Aller, while the Ihme has a shorter river course and flows into a leash north of Hanover.

The water levels are measured at various stations. The current level of the leash in Herrenhausen is 96 cm, which is 38% below the average level of 155 cm. In Neustadt, a level of 180 cm is measured, which is 15% below the mean of 213 cm. In Schwarmstedt the level is 102 cm, also 34% below the average value of 155 cm. This information comes from the platform Wetteronline.

flood warning system and registration levels

When monitoring the leash, various reporting levels for floods are defined, which range from isolated floods (level 1) to larger floods in built -up areas (level 4). The information on flood warnings in Lower Saxony is available via several channels, including radio, television and warning apps. These warnings can be issued by the federal government, countries, circles, police or fire brigade, such as haz.

Accordingly, the highest water level of the leash near Hanover was measured on February 10, 1946 with 644 cm. Warnings in floods take place according to the civil protection and disaster relief law (ZSKG). The water levels are often not specifically defined and appear regularly in the reports of the flood centers.