South Africa, Lesotho: Adverse weather conditions forecast for central regions April 7

The South African Weather Service has issued a level 6 orange warning for severe thunderstorms across parts of the eastern Northern Cape, western North West, western and central Free State, and western Lesotho April 7. Heavy downpours conducive to flooding are possible. Authorities may update the forecast and warnings in the coming hours.

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. 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.

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.