08/05/2026
Severe weather is moving across the Eastern Cape, and a flooding alert is currently active along the Gamtoos River corridor.
When events like this unfold, the question for response teams is the same one every time: who and what is in harm's way?
Using geospatial data, our team mapped the affected corridor - from upstream of Patensie down to the coast at Gamtoos Mouth, in the Kouga Local Municipality. Layering urban erven, farm portions and informal settlements over that corridor brings the picture into focus fast:
• 5 645 urban erven within the affected area
• 1 234 farm portions within the affected area
• 8 informal settlements within the affected area
• 4 towns in scope: Hankey, Patensie, Loerieheuwel and Gamtoos Mouth
One figure stands out. Hankey alone carries roughly two-thirds of the urban exposure — about 3 800 of the 5 645 erven sit there. That kind of concentration is exactly what responders need to see early, so resources, communication and evacuation planning can land where the impact is heaviest.
The corridor also runs through one of South Africa's significant citrus-producing valleys, so the flood footprint has a residential, agricultural and economic dimension all at once. The eight informal settlements remain a separate concern - small in count, but typically the most exposed and least resilient when a dam rises.
This is what geospatial analysis is for: turning a weather warning into a clear, layered view of people, property and economic activity in the path of the event - fast enough to support decisions that matter.
Our thoughts are with the communities of the lower Gamtoos catchment.
