South Africa: Adverse weather forecast across eastern regions through at least Jan. 8

Severe weather is forecast across eastern South Africa through at least Jan. 8. Heavy rainfall accompanied by possible thunderstorms is forecast across the region over the coming days. The South African Weather Service has issued the following warnings:

• Orange level 8 (out of ten) disruptive rain warnings: Eastern KwaZulu-Natal Province.

• Orange level 6 (out of ten) disruptive rain warnings: Gauteng, western KwaZulu-Natal, and Limpopo provinces.

• Orange level 5 (out of ten) disruptive rain warnings: Western and central Mpumalanga

• Yellow level 2-4 disruptive rain warnings: Across the rest of the affected area.

Officials could update and extend the coverage of weather alerts over the coming days.

Sustained heavy rainfall could trigger further 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 rain has saturated the soil. Strong winds could create conditions conducive to wildfire development and growth.

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, strong winds, 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. Flooding could block regional rail lines; freight and passenger train delays and cancellations are possible in areas with 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.