Torrential Rain Warning System

Warning system and other info

When does torrential rains conditions exist?

The criteria for the issuance of a torrential rain warning for the Mauritius and Rodrigues is as follows: Following observations indicating that accumulated rainfall has reached 100 millimetres in a given region or is likely to reach 100 millimetres in a given region in the ensuing hour, and the rain is expected to continue.

Torrential rain can cause flash floods or urban floods in any locality while the most likely effect is water accumulations in flood prone areas. Heavy rain may also be responsible for the overflow of rivulets and streams or even major rivers leading to riverine flooding. Such floods usually occur downstream where it may not be necessarily raining heavily. Another hazard in the aftermath of heavy rain is landslide which can occur on hill or mountain slopes which are usually considered as high-risk areas.

Mauritius Meteorological Services provide flood warning of a general nature without being site specific or quantifying water level in rivers.

Torrential rain warning bulletin

Following observations indicating that accumulated rainfall has reached 100 millimetres in a given region or is likely to reach 100 millimetres in a given region in the ensuing hour, and the rain is expected to continue, the Mauritius Meteorological Services will advise the Ministry of Education, Ministry of Tertiary Education and Human resources and the Police and will issue warnings at regular interval through the MBC and private radio stations.

Whenever torrential rain conditions exist, all schools, pre-primary, primary, secondary as well as tertiary institutions will not be opened.