Rain

The emergency response plan (PIU) in the event of extreme weather conditions defines the actions the government should take in the event of six different weather conditions, including rain.

Orange vigilance - heavy rain warning

rain between 31 and 45 l/m2 in 6 hours, between 41 and 60 l/m2 in 12 hours or between 51 and 80 l/m2 in 24 hours

The possible consequences include:

• heavy rain likely to affect the economic functioning of several sectors of activity;
• flooding in areas that do not usually flood;
• localised unusual rises in the water level of streams and ditches;
• the risk that sanitation systems may overflow;
• potentially difficult road traffic conditions.

Red vigilance - torrential rain warning

rain above 45 l/m2 in 6 hours, above 60 l/m2 in 12 hours or above 80 l/m2 in 24 hours

The possible consequences include:

• very heavy rain which may affect economic and human activity for several days;
• very significant flooding, even in areas that are rarely flooded;
• localised torrential rises in the water level in streams;
• extremely difficult road traffic conditions;
• the risk that sanitation systems may overflow.