04 Nov 2022 | 11:52 AM UTC
South Africa: Adverse weather forecast over multiple regions through at least Nov. 5
Thunderstorms and heavy rainfall forecast over many parts of South Africa through at least Nov. 5. Flooding and disruptions possible.
Event
Heavy rainfall and thunderstorms are forecast across many parts of South Africa through at least Nov. 5. The affected area includes central and northeastern Eastern Cape, Free State, Gauteng, western Limpopo, western Mpumalanga, western North West, eastern and southern Northern Cape, and central and eastern Western Cape provinces. Heavy downpours could lead to flash and urban flooding in some areas. Water, sanitation, and power disruptions are possible.
As of Nov. 4, the South African Weather Service has issued the following weather warnings across the affected area:
Orange Level 5 (of 10) Severe Thunderstorm Warnings: Parts of central and northeastern Western Cape Province.
Yellow Level 4 Disruptive Rain: Parts of central and eastern Free State Province.
Yellow Level 2 Severe Thunderstorm Warnings: Across the rest of the affected area.
Officials could update and possibly extend the coverage of weather alerts over the coming days.
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 located 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 heavy rainfall has saturated the soil.
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 airports across the affected region. 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 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.
Advice
Monitor local media for weather updates and related advisories. Confirm all transport reservations and business appointments before travel. Reconfirm the status of road routes before travel. Make allowances for localized travel delays and potential supply chain disruptions where flooding has been forecast. Do not drive on flooded roads. Charge battery-powered devices in the case of prolonged electricity outages.
