MeteoSwiss - Rain

Level 3 (orange)
Continuous rain (North):
50 mm/24h, 80 mm/48h, 100 mm/72h
Continuous rain (South):
100 mm/24h, 140 mm/48h, 160 mm/72h
Continuous rain (Maggia valley):
150 mm/24h, 200 mm/48h, 240 mm/72h

Possible consequences

The rain might cause brooks, waterfalls and (usually dry) ditches to swell. Exposed caves might overflow.
Road traffic obstructed at exposed places.

Recommendations (The instructions of the authorities are to be followed at any rate!)

Observe the local weather development, get yourself informed and adapt your behaviour to the present conditions

Level 4 (red)
Continuous rain (North):
75 mm/24h, 110 mm/48h, 130 mm/72h
Continuous rain (South):
130 mm/24h, 175 mm/48h, 200 mm/72h
Continuous rain (Maggia valley):
200 mm/24h, 260 mm/48h, 300 mm/72h

Possible consequences

Water meadows, flood-prone areas and lake shore areas are likely to be flooded.
Heavy rain might cause brooks, waterfalls and (usually dry) ditches to swell greatly. Exposed caves might overflow.
On a local level, landslides from steep slopes are possible.
Failure of drainage and sewage systems.
Subways, underground parkings and basement/cellar rooms might be flooded.
Road and rail traffic obstructed.

Recommendations (The instructions of the authorities are to be followed at any rate!)

Observe the local weather development, get yourself informed and adapt your behaviour to the present conditions
Do not pass over flooded road sections or pass them slowly.
Avoid basement/cellar rooms which have been flooded or are likely to be so.
Avoid areas with steep slopes.
Do not make unnecessary phone calls (network failure).

Level 5 (dark red)
Continuous rain (North):
100 mm/24h, 140 mm/48h, 160 mm/72h
Continuous rain (South):
160 mm/24h, 200 mm/48h, 240 mm/72h
Continuous rain (Maggia valley):
250 mm/24h, 310 mm/48h, 350 mm/72h

Possible consequences

Flooding of areas which are not normallyflood-prone.
Heavy rain might cause brooks, waterfalls and (usually dry) ditches to swell heavily, even in areas which are not normally flood-prone.
Landslides are probable.
Failure of drainage and sewage systems.
Subways, underground parkings and basement/cellar rooms might be flooded.
Road and rail traffic obstructed.

Recommendations (The instructions of the authorities are to be followed at any rate!)

Observe the local weather development, get yourself informed and adapt your behaviour to the present conditions
Do not leave your houses and apartments unless absolutely necessary (save for evacuation).
Listen to Swiss National radio as well as local radio channels.
Avoid basement/cellar rooms which have been flooded or are likely to be so.
Stay away from creek beds, lake or river shores and areas of steep slopes.
Do not stay on bridges in case of flood.
Do not make unnecessary phone calls (network failure).