Danger of flooding on the Baltic Sea: water levels alert Warnemünde!

Danger of flooding on the Baltic Sea: water levels alert Warnemünde!

Today, November 1st, 2025, attention on the Baltic Sea coast is once again focused on the water levels. In Mecklenburg-Western Pomerania, the water levels are closely monitored at various measuring stations such as Wismar, Warnemünde, Althagen, Barth, Stralsund, Sassnitz and Greifswald. As the Baltic Sea newspaper reports, the issue of flooding is particularly important here.

The terms “mean low water” (MNW) and “mean high water” (MHW) contain important units of measurement. The MNW for Warnemünde in the period between 2010 and 2020 is 407 cm, while the MHW is 617 cm. For comparison: The highest flood level ever measured in Warnemünde reached 770 cm on November 13, 1872, whereas the lowest level of 332 cm was recorded on October 18, 1967.

Current flood warnings

The risks of potential storm surges are particularly high at the moment. These are defined in classes based on their height above the mean water level. A storm surge begins at 1.00 m above average, while more severe storm surges can even exceed 2.00 m. The most recent severe storm surge in October caused costs of 56 million euros. The city of Sassnitz alone reported a financial need of around 42 million euros to restore the infrastructure. In addition, 6 million euros must be raised to compensate for sand loss on beaches and dunes.

How can residents and visitors protect themselves during flood warnings? According to statements from the authority network, warnings are communicated via numerous channels. These include radio and television, sound trucks, sirens, websites, social media and even digital billboards. Residents should familiarize themselves with these warning mechanisms so that they can react quickly in an emergency.

Floods as a global challenge

However, the issue of flooding is not just a local problem, but affects many regions worldwide. According to information from Statista Flood events have been the most common natural disasters since 2000, causing almost 37 percent of all such events. Climate change plays a significant role here, as the warmer atmosphere leads to more precipitation. Around 400,000 residents in Germany are at risk of flooding in the coming years, especially along important rivers such as the Rhine.

Factors that increase the risk of flooding include the destruction of natural flood plains and the increasing sealing of areas that hinder drainage. In addition, according to the zoning system of the Federation of German Insurers, 7.6 percent of all German addresses are exposed to flood risk, of which around 17 percent are in the medium to highest risk category.

Past flood events, such as the disaster in July 2021, show the vulnerability of our infrastructure. Reconstruction is progressing more slowly than hoped, which is due to both bureaucratic hurdles and inadequate political guidelines for risky construction.

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It is therefore up to each individual to find out about the risks of flooding and to establish contact with the existing warning systems. This is the only way we can respond to possible flood events in the best possible way.