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When should we write to you about Holod?

When should we write to you about Holod?Alert level: 300 cmrecommended nowAn official flood-defence level published by the source. For homes and land near the water.Flood level: 375 cmAn official flood-defence level published by the source. For homes and land near the water.Danger level: 410 cmAn official flood-defence level published by the source. For homes and land near the water.A level you choosePick the level on the scale yourself, for example the level at which your dyke floods.

Choose above when we should write to you.