Mauritius: Adverse weather forecast across much of the country through at least Dec. 25

Heavy rainfall and thunderstorms are forecast across Mauritius through at least Dec. 25. The Mauritius Meteorological Service has issued a torrential rainfall warning across Mauritius Dec. 19. Some areas have received up to 10 cm (4 inches) of rainfall early Dec. 19 and moderate -to-heavy showers with thunderstorms are expected to persist over the coming hours. The service has warned that some rivers and watercourses will remain flooded and there is an increased risk of localized flash floods. People are advised to remain in a safe place, avoid flood-risk areas, and travel with caution due to reduced visibility. Further showers of varying intensity and isolated thunderstorms are forecast across parts of the country through Dec. 25, mainly over the Central Plateau and eastern and southern parts of Mauritius; authorities will likely issue further weather warnings accordingly.

Sustained heavy rainfall could trigger flooding in low-lying communities near rivers, streams, and creeks. Urban flooding is also possible in developed areas with easily overwhelmed stormwater drainage systems. Sites downstream from large reservoirs or rivers may be subject to flash flooding after relatively short periods of intense rainfall. Landslides are possible in hilly or mountainous areas, especially where the soil has become saturated by heavy rainfall.

Authorities could issue mandatory evacuation orders for flood-prone communities over the coming days. Disruptions to electricity and telecommunications services are possible where significant flooding or landslides impact utility networks.

Floodwaters and debris flows may render some bridges, rail networks, or roadways impassable, impacting overland travel in and around affected areas. Ponding on road surfaces could cause hazardous driving conditions on regional highways. Authorities could temporarily close some low-lying routes that become inundated by floodwaters.

Severe weather could also trigger flight delays and cancellations at regional airports, including Sir Seewoosagur Ramgoolam International Airport (SRU). Authorities may temporarily suspend port operations or close beach fronts if strong winds trigger hazardous sea conditions.

Localized business disruptions may occur in low-lying areas; some businesses might not operate at full capacity because of flood damage to facilities, possible evacuations, and some employees' inability to reach work sites.