"The whole Moot is seeing it" — entire ant colonies, complete with queens, eggs and larvae, are migrating 1 to 4 metres higher up walls, trees and structures. Is Mother Nature sending a serious warning that heavy rain and flooding is about to hit Pretoria?
If you live in the Moot, Montana, or anywhere in northern Pretoria, you've probably noticed it too. Over the past week, locals like Wouter Venter, Chantel Geël Seegers, Alwyna Holtzhausen, Karin Fourie and many others have reported the same bizarre sight: ant nests relocating en masse to higher spots. Some are even climbing into homes.
Farmers have sworn by this sign for generations: "Miere weet wanneer groot reën kom" (ants know when big rain is coming). But is it ancient folklore, solid science, or both?
Why Are Ants Suddenly Moving Higher in the Moot?
Ants are highly sensitive to changes in humidity, air pressure and soil moisture. Their underground nests can flood rapidly during heavy thunderstorms — a single heavy downpour can turn tunnels into death traps for the queen and brood.
When they sense danger, worker ants quickly carry eggs, larvae, pupae and food stores to safer, elevated locations. In low-lying or poorly drained areas like parts of the Moot, this often means moving 1–4 metres up walls, pipes or vegetation. Multiple colonies acting together across a neighbourhood is especially striking and has residents asking: Is big rain and possible localised flooding on the way?
This behaviour is well-known in South Africa, particularly on farms. Similar observations have been reported before heavy storms around the world. While science confirms ants react quickly to approaching moisture (acting like living barometers), they may not predict events weeks in advance — but mass movement is still a strong signal that wet weather could be imminent.
What Does the Weather Forecast Say for Pretoria Right Now?
April marks the tail end of Gauteng’s summer rainfall season. While average rainfall decreases, isolated thunderstorms and heavy downpours can still occur, especially with lingering moisture or cut-off lows. Recent days have seen warnings for disruptive rain and localised flooding in parts of the interior.
Pretoria’s low-lying spots and drainage issues mean even moderate rain can cause flash flooding on roads and in suburbs like the Moot. Past events have shown how quickly water can accumulate in the area.
If the ants are reacting to real atmospheric shifts, we could see increased thunderstorm activity or heavier late-season rain in the coming days to weeks. Always check the latest South African Weather Service (SAWS) updates and radar for official warnings rather than relying only on our six-legged neighbours.
What Should Moot Residents Do?
- Monitor the ants — sudden mass invasions into homes often mean rain is very close.
- Prepare for possible flooding: Clear gutters, storm drains and low-lying areas. Move vehicles and valuables if you're in a flood-prone spot.
- Natural ant deterrent: One resident recommends mixing cinnamon and bicarbonate of soda (half-half) and sprinkling it around — it may help discourage them without harsh chemicals.
- Stay informed: Follow SAWS for Yellow/Orange level warnings on heavy rain, lightning, hail and localised flooding.
Whether it’s pure instinct or a reliable weather clue honed over millions of years, the ants of the Moot are putting on quite a show. Those tiny survivors have dealt with floods for millennia — they’re simply protecting their colony.
Have you spotted ants moving higher in your garden or home in the Moot, Montana or Pretoria North? Drop your observations in the comments — is the whole neighbourhood experiencing this?
Keep an eye on the skies (and the ground) this week. Better safe than sorry when it comes to Pretoria thunderstorms and flash floods. ???
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