Level 8 disruptive rainfall warnings issued for Eastern and Western Cape, South Africa

South Africa is entering a period of elevated weather risk as an intense cut-off low system moves across the country between May 5 and 7, prompting the South African Weather Service (SAWS) to issue impact-based warnings across multiple provinces, including the highest-level alerts for disruptive rainfall.

Parts of the Eastern Cape, including Koukamma and Kouga Local Municipalities, are under an Orange Level 8 warning, with authorities forecasting a high probability of flooding that may affect settlements, roads and infrastructure. Low-lying areas face potential isolation, with access routes at risk of inundation during peak rainfall.

A separate Level 8 warning is in effect for the Garden Route region in the Western Cape, where disaster management teams have activated high-alert protocols. Rainfall totals are forecast to reach 150–200 mm (5.9–7.9 inches), with peak accumulation expected between Wednesday and Thursday, May 6 and 7. Such volumes are sufficient to trigger river overflow, surface flooding, and widespread saturation of soils.

SAWS uses an impact-based severe weather warning system ranging from Level 1 to Level 10, where higher levels correspond to increasing likelihood and severity of impacts rather than the intensity of the weather system alone.

Local disaster management officials said rainfall in parts of the Garden Route could range between 100 and 200 mm (3.9–7.9 inches), accompanied by wind gusts of 70–80 km/h (43–50 mph) and wave heights of 5–8 m (16–26 feet) along the coast, creating hazardous marine environments and increasing exposure along coastal infrastructure.

Lower-level warnings extend across the Northern Cape, Free State, North West, Gauteng, Mpumalanga, and Limpopo, where severe thunderstorms, localized flooding, and damaging winds are forecast. Gauteng, including Johannesburg, remains under a Yellow Level 2 warning for disruptive rainfall.

KwaZulu-Natal is also expected to experience severe thunderstorm activity as the system shifts eastward, expanding the zone of impact into central and eastern parts of the country.

Flooding remains the primary hazard across affected regions, particularly in poorly drained or low-lying areas where rapid rainfall accumulation can inundate transport routes and residential zones. In mountainous terrain, saturated ground conditions raise the risk of mudslides and rockfalls, while reduced visibility during heavy rain is expected to affect road safety.

In the Garden Route, officials said dam levels are expected to rise sharply as rainfall continues over already stressed catchments.

“We are expecting dam levels to rise significantly during the following two days,” Garden Route District Municipality officials said. “Several key dams, including those in George and Mossel Bay, have remained under pressure compared to last year.”

Cold air associated with the system is forecast to bring very cold conditions to elevated areas, with disruptive snowfall possible over parts of the Northern Cape, Western Cape, and Eastern Cape, adding pressure to transport corridors and infrastructure.

References:

¹ Regional weather forecast for May 5, 2026 – SAWS – May 5, 2026

² Orange Level 8 weather warning issued for Garden Route – SABC – May 4, 2026