Inundated hazard map (floods, inland water (floods from sewers and waterways), areas where there is a possibility of high tides)

Inundated hazard map is a compilation of three hazard maps, flood, inland water, and high tides.
Each map summarizes information such as expected inundation areas and depths.
Disasters assumed vary depending on the map, so please check each other.

Floods (river flooding) means that the water level of rivers rises due to heavy rain, water overflows across dike, and sediment from dike flows out and breaks down.
It causes large-scale damage, such as collapse or runoff of houses.
Please note that inland water and high tides are not expected in the flood hazard map.

Inland water flooding means that rainwater cannot be drained and flooded when the amount of rain exceeds the drainage capacity of sewers, etc., or when the water level at drainage destinations such as rivers rises.
Please note that there is no flood or damage to the high tides inland water hazard map.

In high tides, when a typhoon or developed low pressure passes, the sea level (tide level) can rise significantly, which is called "high tides."
Please note that there is no flood or inland water damage in high tides hazard map.

More detailed maps can be viewed from the "Flood, Inland Water, high tides Inundation Area" of the Yokohama City Administrative Map Information System "Waiwai Disaster Prevention Map".

• Yokohama-shi administrative map reporting system (outside site)

Published in October 2024

• Inundated hazard map (Naka Ward version)

The same thing that can be downloaded is distributed at General Affairs Division Naka Ward Office.