Violent thunderstorms and heavy rain can cause flooding, landslides, high water and power outages. It is usually impossible to predict where and to what extent a thunderstorm will erupt, but the risk is definitely increased in the summer months. Contamination of drinking water is a risk that should not be underestimated. This is especially the case when the levels of lakes, rivers or streams rise and contaminated water gets into the drinking water. When large residential or industrial areas are flooded, contamination may also be caused by heating oil or chemicals from industrial plants.

If the Department of Health or the competent authorities detect contamination in drinking water, the surrounding population and affected persons must be warned immediately and informed accordingly. Information, such as boiling the drinking water, is often spread by means of mobile sirens with voice announcements or over the radio. When devastating thunderstorms and storms lead to floods, high water and power cuts, it is important to protect people, animals and property.

Stationary and mobile siren systems are among the most reliable and robust means of alerting in disaster situations, as they work for days even during long power cuts or when the mobile phone network fails and cannot be overheard. Early warning can save lives in emergencies.

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