Severe weather in the Cape has once again shown how quickly South Africa’s communications networks can buckle when storms hit hard, with Telkom confirming network disruptions across parts of the Eastern Cape and Western Cape after days of heavy rain, flooding and gale-force winds. The operator said the impact was felt mainly on internet services, while voice calls largely continued to work, offering at least some relief to customers trying to stay connected during one of the worst weather spells the region has seen in years.
In a statement on the disruptions, Telkom said parts of its network were affected by the inclement conditions, with restoration work already underway in some areas. The company indicated that some services had been brought back online, but stressed that it was still monitoring the network as the storm system continued to cause havoc across the south-western and southern parts of the country.
For many South Africans in the affected provinces, the timing could hardly have been worse. The Cape has been battered by a cut-off low-pressure system and a second frontal weather system, bringing widespread flooding, road closures and damage to infrastructure. In the Garden Route, local authorities said the eastern districts had seen flooding of a severity not experienced in around 30 years, forcing the closure of at least 45 roads and cutting off several inland communities.
Emergency teams and disaster officials have been working through difficult conditions, with aerial reconnaissance flights deployed to assess the extent of the damage and to look for stranded residents. As we reported earlier, the storm has not only damaged homes and roads, but also put enormous strain on the basic services people rely on to work, travel and communicate.
The South African Weather Service escalated concerns further by issuing a level-8 warning for the Western Cape as the second system moved over Cape Town and the Winelands on Monday. The Provincial Disaster Management Centre later confirmed three storm-related deaths, while schools across the province were shut on Tuesday as a safety precaution. In Cape Town, the city said its crews were unable to safely carry out electricity-related work because of the heavy rain and dangerous winds.
Telkom network disruptions expose how storms strain South Africa’s connectivity
This is where the telecom impact becomes especially serious. When the grid goes down, mobile sites typically switch to battery backup, but those reserves are never designed to carry a community through long, punishing outages. Once batteries drain, operators depend on generators, access routes and repair crews getting to the site in time. In a storm like this, that becomes a major challenge.
Fibre infrastructure is also vulnerable. Cabinets, distribution points and access lines can be affected by flooding, water ingress and physical damage from falling trees or debris. Even where the network itself survives, engineers may struggle to reach critical points because roads are closed or unsafe. On the Cape south coast, Overstrand municipality said on Tuesday that most cellphone networks were down, leaving communication severely limited for residents and businesses.
That local breakdown fits with what customers were seeing online. Downdetector recorded a sharp rise in user-reported outages on Tuesday evening across several providers, including Telkom, Openserve, Vumatel, Vodacom and Vox. That suggests the problem was broader than one operator and points to weather-related strain across the telecommunications ecosystem.
Telkom has not yet said exactly how many customers were affected, which towns took the hardest hit or when full normal service will be restored. For now, the picture remains fluid, with restoration teams likely still dealing with damaged lines, inaccessible sites and the knock-on effects of prolonged rainfall across the Western Cape and Eastern Cape.
There is also a wider lesson here for South Africa. Storms are becoming more disruptive, and the country’s communications infrastructure is being tested in real time. Businesses, schools, hospitals and households all depend on stable internet access, and when that fails, the effects ripple quickly through daily life. Even if voice calls remain up, the loss of data can still cripple remote work, digital banking, school administration and emergency coordination.
The Cape’s latest weather crisis has therefore become more than a local emergency. It is a reminder that network resilience is now a frontline issue, not a back-office concern. Telkom’s update may reassure some customers that calls were still going through, but the broader disruption across the region shows how exposed essential services remain when extreme weather arrives. For now, the focus is on recovery, repairs and making sure communities can reconnect as quickly and safely as possible.