31 Jan 2021 | 10:56 AM UTC
South Africa: Flooding likely in northeast regions Feb. 1-2
Authorities warn of disruptive rain and flooding in eastern parts of Limpopo and Mpumulanga provinces, South Africa, Feb. 1-2.
Event
The South African Weather Service (SAWS) has issued a level-5 orange warning for disruptive rain for eastern parts of Mpumulanga and Limpopo provinces Feb. 1-2. SAWS indicates that flooding leading to damage of property and traffic disruptions is likely. Impacted areas could receive as much as 50 mm (2 inches) of rain in 24 hours. SAWS could update or amend the advisory in the coming days. The likelihood of flooding is elevated due to recent significant rainfall caused by the passage of Tropical Storm Eloise.
Communities with poor or a lack of stormwater drainage systems may experience urban flooding during periods of significant rainfall, while areal flooding poses a threat to sites near rivers and streams - particularly those within recognized floodplains. Deadly flash flooding is possible following torrential downpours, especially in vulnerable communities near the edge of watercourses. Landslides and mudslides could occur in hilly or mountainous areas.
Floodwaters and debris flows may render some bridges, rail networks, or roadways impassable, impacting overland travel in and around affected areas, especially in rural areas, where infrastructure is already of a poor standard. 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. Flooding could block regional rail lines; freight and passenger train delays and cancellations are likely in areas that see heavy rainfall and potential track inundation. Localized business disruptions may occur; some businesses might not operate at full capacity because of flood damage to facilities, possible evacuations, and some employees' inability to reach work sites.
Health
The threat of disease outbreaks is elevated during the rainy season. Backflow from drains that has mixed with floodwaters can become trapped in open areas when inundations recede. These stagnant pools often become a breeding ground for mosquitoes and bacteria, increasing the incidence of insect- and waterborne diseases. Exposure to contaminated water from inundated industrial sites, sewer systems, and septic tanks also poses a significant health threat.
Advice
Monitor local media for updates and advisories on weather conditions. Confirm all transport reservations before travel. Make allowances for possible supply chain disruptions throughout the rainy season, particularly in areas affected by flooding and or/landslide events. Avoid low-lying areas near streams, rivers, and other bodies of water, such as reservoirs and coastlines, due to the threat of flooding. Do not drive on flooded roads. Exercise caution in elevated terrain due to the threat of landslides and mudslides. Charge battery-powered devices when electricity is available; restrict the use of cellphones to emergencies only during periods of severe weather. Take precautions against insect- and waterborne diseases. Keep any necessary medications in a waterproof container.
