Dams Overflow as South Africa Gears Up for Wet Summer

Dams Overflow as South Africa Gears Up for Wet Summer

South Africa’s interior is waking up to overflowing dams and flash floods, a sign that this summer could be wetter than usual. A week of record-breaking rain has left Gauteng, Mpumalanga, Limpopo, and parts of the Free State soaked, with meteorologists pointing to a weak La Niña system as the driving force behind the deluge.

Dams bursting at the seams

According to the Department of Water and Sanitation, Gauteng’s dams are now at full capacity, while the Vaal Dam in the Free State has reached 101%, a staggering jump from just 33% this time last year.

The Bronkhorstspruit Dam is also overflowing, marking 100% capacity, compared with 66% in 2024. These numbers indicate a major recovery for the country’s water supply after years of drought that strained households, farmers, and municipalities alike.

Heavy rains sweep the interior

Meteorologist Michelle Cordier from Vox Weather said the past week brought significant rainfall, with isolated incidents of flooding, hail, and even a reported tornado in Newcastle, which recorded 115mm of rain in just a few days. Alberton in the East Rand saw 64mm, while Pretoria recorded 40mm, causing temporary disruptions in shopping malls and local traffic.

“The rain was the result of a combination of weather systems an upper air trough, surface high and low pressure systems working together to deliver widespread showers,” Cordier explained.

Thunderstorms and flood warnings continue

The South African Weather Service (SAWS) has issued a yellow level 2 warning for severe thunderstorms over Gauteng, Mpumalanga, and Limpopo for early this week. Scattered to widespread showers and thundershowers are expected across central and northeastern regions, though rainfall may ease later in the week.

Cordier noted that some of the sleet or “snow” observed in Pretoria North was actually small hail, as temperatures were not low enough for genuine snow.

A promising outlook for summer

Seasonal models indicate above-average rainfall for the country’s summer rainfall areas, largely influenced by the La Niña phenomenon. This forecast is welcome news for farmers, water management authorities, and urban areas prone to water shortages during dry spells.

While residents enjoy relief from parched dams, the heavy rainfall also brings risks of localized flooding, road disruptions, and property damage, meaning the public is advised to stay alert and heed official warnings.

Social media reaction: a mix of relief and caution

South Africans took to social media to share their delight at the rains. One X (formerly Twitter) user wrote, “Finally, some proper rain! Our dams are full, and my garden is happy!”

However, others highlighted the flooding dangers, posting pictures of waterlogged streets and warning neighbors to be cautious.

What this means for water security

Full dams provide a buffer for the upcoming dry months and give farmers hope for a productive summer season. After years of drought and water restrictions, these above-average rains are a reminder of the fragility and importance of South Africa’s water resources.

With La Niña conditions continuing and seasonal forecasts pointing to more rainfall, residents can expect a wetter-than-usual summer, but one that will require vigilance as thunderstorms and flash floods remain a constant threat.

{Source: The Citizen}

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