Smoke on the horizon and blackened veld are a normal part of Kruger, not a disaster: fire has shaped this savanna for millions of years, and SANParks deliberately lights some of it as part of a fire policy built on research going back to 1954. Here is how that policy developed, what decades of experiments have shown, and what burns mean for your game drives.
Fire Is Part of the Savanna
Savannas are defined by grass and trees living side by side, and fire is one of the main forces that keeps that balance. Dry winters, a thick layer of cured grass and plenty of ignition sources (lightning and people) mean that fire returns to Kruger almost every year. A study by SANParks scientists of the park's fire records from 1941 to 2017 found that fires burned somewhere in the park nearly every year, including the periods when fire was officially suppressed.
How much fire matters depends on rainfall. In wetter savannas (roughly above 650 mm of rain a year), there is enough water for trees to close their canopy, and only fire and browsing animals keep the landscape open. In drier savannas, lack of water already limits tree cover, so fire is a less dominant force. Kruger spans both: the Pretoriuskop sourveld in the southwest gets around 700 mm a year, while the mopane country in the north gets around 450 mm. That is one reason fire policy in Kruger has never been one-size-fits-all.
A Century of Changing Fire Policy
Kruger's approach to fire has changed several times since the park was proclaimed in 1926, and each change reflected what scientists and managers believed at the time.
1926 to the 1950s: fire as a necessary evil. In the early decades there was no formal burning policy. Fire was widely seen as harmful to vegetation, a view reinforced nationally by the 1926 Drought Investigation Commission. Even so, rangers burned areas in autumn to provide green grazing for the winter.
1954: the Experimental Burn Plots. Kruger started one of the longest-running fire experiments in the world. Plots of about 7 hectares were laid out in four major landscapes (Pretoriuskop sourveld, Combretum woodland near Skukuza, knobthorn and marula savanna near Satara, and mopane in the north), with repeated plots in each. Each plot received a fixed treatment: burning every one, two, three, four or six years, in different months (February, April, August, October or December), or complete protection from fire. The design has been modified over the decades, but the plots are still burned and studied today.
1957 to 1980: fixed-rotation block burning. Once it was accepted that fire is integral to savannas, Kruger introduced regular prescribed burning every three years in fixed blocks, a system that ran for more than two decades.
1981 to 1991: flexible burning. The rigid three-year rotation was replaced by a more flexible approach to prescribed burning.
1992 to 2001: the lightning fire policy. Kruger tried to recreate a "natural" fire regime: lightning fires were allowed to burn freely, while fires started by people were prevented, suppressed or contained. In the mid-1990s the park also introduced "thresholds of potential concern", upper and lower limits for things like fire frequency, season, intensity and size that trigger a management response when crossed. After about a decade it was clear that a lightning-driven regime could not be achieved, because fires started by people still dominated the fire regime.
2002 onwards: integrated fire management. Since 2002, rangers use point ignitions to start fires in areas where fire is considered necessary, and accept wildfires there too. Each year a target area is set according to rainfall and fuel load. Between 2002 and 2006 the targets ranged from 12% to 24% of the park.
What the Research Has Shown
Decades of data from the burn plots and park-wide fire records have produced some clear, and sometimes surprising, results.
Rainfall drives how much burns, not policy. Analysis of park records from 1957 to 2001 found that the total area burned each year depended mainly on grass fuel, which depends on rainfall over the previous two years. The amount burned did not differ significantly between the block-burning, flexible and lightning eras. After good rains Kruger burns a lot; after drought it burns little, whatever the plan says. Large fires dominate: between 2002 and 2006, fires bigger than 5,000 hectares made up 77% of the total area burned.
Extremes matter most. On the burn plots, the strongest effects on vegetation came from extreme treatments: burning every year, burning in the summer wet season, or excluding fire for decades. These effects were greater in the wetter landscapes. Fire changed vegetation structure and biomass more than which species were present, and animal communities and soils were largely unaffected by the range of treatments.
Season controls intensity. A study of 956 experimental burns over 21 years recorded fire intensities from 28 to almost 18,000 kW per metre. Season was a key factor because it changes how dry the grass is, and fuel load mattered too. Managers can therefore make a fire cooler or hotter by choosing when to burn.
Elephants and fire act together. Elephants strip bark and break trees, and a damaged tree is far more likely to be killed by a fire it would normally survive. Where either fire or elephants are absent, large trees tend to dominate, but together they reduce large trees. A 56-year study of the burn plots (Pellegrini et al., 2017) found that while elephants were scarce, more frequent fire clearly reduced woody biomass. After elephant culling stopped in 1994 and numbers grew, that fire effect became weak to negligible, and elephants could open up dense woodland even in plots that were never burned. You can read more about elephant feeding in our elephant behaviour guide.
Burns create grazing lawns. Research using LiDAR in Kruger (Singh et al., 2024) found that small experimental fires of any size or season produced about a fourfold increase in short grass cover, and that these grazing lawns persisted even after burning stopped. At Satara, a study of the burn plots found herbivore densities on the plots far higher than in the surrounding area, although the authors warn the plots are too small to represent the whole park.
What Fire Does to Plants and Animals
Most savanna grasses are built for fire. Their growing points sit at or below ground level, so they resprout from the base soon after a burn, and the new leaves are short, tender and higher in quality than the old dry grass, even though there is less of it. This is the "green flush" that grazers love. Many savanna trees resprout from the base or roots if their stems are killed, and larger trees with thick bark usually survive moderate fires. The real damage happens to small trees that are repeatedly burned back and to big trees already wounded by elephants.
Most large animals simply move away from an approaching fire front. Others actively use fires: insect-eating birds and raptors often hunt along the edge of a burn, catching grasshoppers and other prey flushed by the flames. Over the following weeks, grazers such as zebra, wildebeest and impala concentrate on the fresh regrowth, and predators follow. The open, short grass also makes it easier for prey to spot danger, which is part of the attraction.
Planned Burns vs Wildfires
| Planned burn | Wildfire |
|---|---|
| Lit by trained staff in chosen conditions | Started by lightning or by people, often accidentally |
| Area and timing chosen in advance | Can burn for days across very large areas |
| Season chosen to make fire cooler or hotter | Often hot and fast in the late dry season |
| Part of the park's fire management plan | Requires an emergency response |
Before lighting a fire, staff look at fuel load, grass moisture, wind, humidity and temperature, because these determine how a fire behaves and whether it can be contained. Research on Kruger's fire record has recommended burning larger areas earlier in the dry season, when grass is not yet fully dry, to reduce the risk of huge, intense late-season fires.
What Visitors Notice
Smoke and haze. Smoke columns are common in the dry season. Most are planned burns or fires being monitored, but if you are unsure, ask at camp reception. Smoke can reduce visibility on the road, so slow down and close your windows if you are sensitive to it.
Closed roads. Some roads, especially gravel roads, are closed during active burns or wildfires. A barrier or ranger instruction means the road is closed, even if it looks clear ahead. Check with reception before setting off and be ready to change your route.
Black, burned veld. Burned areas look bleak for a few days, but resprouting grass can turn them green within days to weeks, and much faster once the rains arrive.
Green flush hotspots. A burn patch with fresh green grass is one of the best places to find grazers, and therefore predators, especially when the rest of the veld is dry and brown. Combine this with water: a recent burn close to a waterhole is often excellent. See our guides to dry season waterholes and how weather shapes animal behaviour.
What You Should Do as a Visitor
Do:
- Obey road closures, barriers and ranger instructions
- Report fire that looks uncontrolled, especially near camps, roads or the boundary, to camp reception or the park's emergency line (numbers are on our emergency page)
- Revisit fresh burn patches in the following weeks for grazers and predators
Don't:
- Drive towards an active fire front or into thick smoke
- Get out of your car to look at or photograph a fire
- Fly a drone to film a burn: SANParks does not permit drones in any national park
The Bigger Picture
Fire management sits alongside elephant management, water-point policy and alien plant control as part of how SANParks looks after Kruger, all of it guided by research and adjusted as new results come in. Scientists themselves point out open questions, such as whether a varied fire pattern really increases biodiversity, and how rising CO2 levels and growing elephant numbers will change the balance between grass and trees. If you notice alien plants or damaged roads on your drives, our guide on reporting alien plants and road damage explains how to help. Learn more about the park's science on our Conservation page.
Frequently Asked Questions
Why does SANParks burn the bush on purpose? To keep the savanna open, provide fresh grazing, reduce the build-up of dry grass that feeds huge wildfires, and create a mix of recently burned and long-unburned areas. Kruger has used regular prescribed burning since 1957.
Do animals die in controlled burns? Most large animals move away from fires, and long-term studies on the burn plots found animal communities largely unaffected by the different fire treatments. Some small, slow-moving animals and insects are killed, which is why birds of prey often hunt along fire fronts.
When are you most likely to see fires in Kruger? Mainly in the dry season, roughly from late autumn until the first good summer rains, when the grass is cured. How much burns in a given year depends largely on how much grass grew after the previous two rainy seasons.
Is it safe to visit Kruger when there are fires? Generally yes. Follow road closures and ranger instructions, avoid driving into smoke, and ask at reception if you are unsure about your planned route.
What is the green flush? The burst of short, nutritious green grass that sprouts after a fire. It attracts grazers such as zebra, wildebeest and impala, and predators follow them.
Related Guides
- Weather and Animal Behaviour - how season shapes what you see
- Top Waterholes in Dry Season - where animals concentrate when it is dry
- Understanding Elephant Behaviour - the other big force shaping Kruger's trees
- Navigating Dirt Roads - driving safely when gravel roads are open again
- Conservation in Kruger
Next time you smell smoke in Kruger, look twice. That haze on the horizon is usually part of a system that has kept this savanna open for a very long time, and in a few weeks the same patch may be the best game viewing on your route.