Dust storms, also called sand and dust storms, are natural hazards that occur when strong winds lift large quantities of loose soil, sand and fine particles into the atmosphere. They are particularly common in arid and semi-arid regions, but dust can travel hundreds or even thousands of kilometres from its original source and affect places far away.
Dust storms are more than just a problem of dirty air or reduced visibility. High concentrations of airborne particles can affect the lungs, heart and cardiovascular system, while severe storms can disrupt road and air transportation, agriculture, water quality and daily activities.
Understanding the causes, warning signs, health risks and appropriate safety measures can help individuals and communities reduce exposure and respond more effectively.
WHAT IS A DUST STORM?
A dust storm occurs when strong winds lift loose particles from the ground and carry them through the atmosphere.
The particles may include:
- Fine soil
- Sand
- Clay
- Mineral particles
- Dried agricultural soil
- Dust from exposed land
- Other material present on the ground
The size and composition of airborne particles can vary considerably. Smaller particles can remain suspended in the atmosphere for long periods and travel great distances.
Dust storms can occur naturally, but human activities that degrade or expose land can increase the availability of loose material for wind erosion.
HOW DO DUST STORMS FORM?
Several conditions can combine to produce a dust storm.
1. STRONG WINDS
Strong winds provide the energy needed to lift loose particles from the ground.
When wind speed becomes sufficiently high, particles can be lifted and transported through the atmosphere.
Wind associated with thunderstorms, pressure systems or strong weather fronts can sometimes trigger sudden dust events.
2. DRY SOIL
Dry soil is much easier for wind to disturb than moist, compacted soil.
Extended periods without sufficient rainfall can therefore increase the amount of loose material available for wind erosion.
3. DROUGHT
Drought can reduce soil moisture and vegetation cover.
As vegetation dies or becomes sparse, more bare soil is exposed to wind.
WHO identifies drought, land degradation, agricultural practices, overgrazing and deforestation among factors that can contribute to dust-emitting conditions.
4. SPARSE VEGETATION
Plants help hold soil in place.
When vegetation is removed or degraded, the soil becomes more vulnerable to wind erosion.
This can happen through:
- Deforestation
- Overgrazing
- Excessive cultivation
- Land clearing
- Unsustainable land management
- Desertification
5. AGRICULTURAL ACTIVITIES
Agricultural land can become a source of airborne dust when soil is exposed and dry.
Improper land management may increase erosion, particularly when vegetation cover is reduced.
6. DESERTS AND DRY LANDSCAPES
Large deserts and semi-arid regions are among the world's major natural dust sources.
Important source regions include parts of:
- North Africa
- The Middle East
- Central Asia
- East Asia
- Australia
However, dust does not remain confined to these areas. Winds can transport particles over very long distances.
THE MAIN DANGERS OF DUST STORMS
Dust storms can create several hazards at the same time.
The major concerns include:
- Poor air quality
- Respiratory irritation
- Asthma aggravation
- Cardiovascular stress
- Eye irritation
- Reduced visibility
- Traffic accidents
- Aviation disruption
- Contaminated surfaces and water
- Agricultural damage
- Economic disruption
1. RESPIRATORY PROBLEMS
Dust particles can enter the respiratory system when inhaled.
Exposure may cause:
- Coughing
- Throat irritation
- Runny nose
- Wheezing
- Shortness of breath
- Chest discomfort
- Difficulty breathing
People with existing respiratory conditions may experience worsening symptoms.
WHO notes that sand and dust storm episodes increase particulate-matter concentrations and are an important public-health concern, particularly for respiratory and cardiovascular health.
2. ASTHMA ATTACKS
Dust can irritate the airways and aggravate asthma.
People with asthma may experience:
- Increased coughing
- Wheezing
- Chest tightness
- Shortness of breath
People with asthma should follow their prescribed asthma management or action plan and reduce exposure to dusty outdoor air whenever possible.
3. CARDIOVASCULAR HEALTH RISKS
Very small airborne particles can penetrate deeply into the lungs.
Some fine particles can cross into the bloodstream and contribute to cardiovascular effects.
Exposure to particulate matter has been associated with increased risks involving:
- Heart disease
- Stroke
- Other cardiovascular problems
WHO states that the health risks associated with particulate matter are particularly well documented, with fine particles capable of penetrating deep into the lungs and entering the bloodstream.
4. EYE IRRITATION
Dust can irritate the eyes and cause:
- Redness
- Burning or stinging
- Excessive tearing
- Gritty sensation
- Temporary discomfort
- Increased sensitivity
Contact lenses can become particularly uncomfortable when dust particles enter the eyes.
Avoid rubbing the eyes because this can increase irritation.
5. REDUCED VISIBILITY
One of the most immediate dangers of a severe dust storm is the sudden reduction in visibility.
A thick dust cloud can make it difficult to see:
- Vehicles
- Pedestrians
- Road signs
- Traffic lights
- Buildings
- Obstacles
Visibility can deteriorate rapidly, creating dangerous conditions for drivers.
6. ROAD ACCIDENTS
Drivers may encounter a sudden wall of dust that severely reduces visibility.
This can result in:
- Rear-end collisions
- Vehicles leaving the road
- Multi-vehicle accidents
- Difficulty identifying hazards
- Traffic congestion
Drivers should avoid continuing through an area where visibility has become dangerously poor.
7. AVIATION DISRUPTION
Dust storms can affect airports and aircraft operations by:
- Reducing visibility
- Creating hazardous take-off and landing conditions
- Contaminating or damaging aircraft components
- Disrupting airport operations
WMO notes that major dust storms can disrupt both road and air transportation.
8. DUST CONTAMINATION
Dust can cover:
- Homes
- Vehicles
- Roads
- Machinery
- Solar panels
- Agricultural land
- Outdoor equipment
Heavy dust accumulation can increase cleaning and maintenance requirements.
9. AGRICULTURAL DAMAGE
Dust storms can affect agriculture by:
- Removing fertile topsoil
- Damaging crops
- Covering leaves with dust
- Reducing photosynthesis
- Affecting irrigation systems
- Increasing soil erosion
Long-term land degradation can also contribute to future dust problems.
10. WATER QUALITY PROBLEMS
Large quantities of airborne dust can settle into rivers, reservoirs and other water sources.
This can affect water quality and increase the amount of sediment that must be managed.
WHO identifies impacts on water quality among the wider environmental consequences of sand and dust storms.
WARNING SIGNS OF AN APPROACHING DUST STORM
A dust storm can sometimes develop rapidly, but several signs may indicate increasing risk.
1. STRONG OR GUSTY WINDS
Sudden increases in wind speed can lift loose dust and sand into the air.
2. A GROWING WALL OF DUST
A large brown, orange or grey cloud approaching from the horizon can indicate a significant dust storm.
3. RAPIDLY DARKENING OR HAZY SKIES
The atmosphere may become noticeably hazier as airborne particles increase.
4. SUDDEN DROP IN VISIBILITY
If distant buildings, mountains or roads suddenly become difficult to see, dust concentrations may be increasing rapidly.
5. OFFICIAL WEATHER WARNINGS
Always monitor official meteorological and emergency alerts when dust storms are possible.
Modern monitoring and forecasting systems can provide advance information about dust events and help communities prepare. WMO continues to develop dust monitoring, forecasting and early-warning systems.
HOW TO STAY SAFE BEFORE A DUST STORM
1. CHECK WEATHER AND AIR-QUALITY INFORMATION
Monitor official:
- Weather forecasts
- Dust-storm warnings
- Air-quality information
- Emergency alerts
Pay attention to conditions rather than relying only on what is visible outside.
2. PREPARE MEDICINES
People who regularly use prescribed medication for asthma, COPD or other chronic conditions should ensure that their medication is available.
Do not change prescribed medication without medical advice.
3. PREPARE YOUR HOME
Before severe dust arrives:
- Close windows and doors.
- Check that doors seal properly.
- Reduce openings through which dust can enter.
- Prepare suitable air filtration if available.
- Keep essential medication indoors.
4. PROTECT VULNERABLE PEOPLE
Extra care should be taken with:
- Young children
- Older adults
- People with asthma
- People with COPD
- People with heart disease
- People with other chronic respiratory conditions
Children and people with chronic conditions can be more vulnerable to the health effects of polluted air.
HOW TO STAY SAFE DURING A DUST STORM
1. STAY INDOORS WHEN POSSIBLE
The simplest way to reduce exposure is to avoid outdoor air during severe dust conditions.
Close:
- Windows
- Doors
- Other openings
Remain indoors until conditions improve.
2. KEEP INDOOR AIR CLEANER
Where available:
- Use an appropriate air purifier.
- Keep windows and doors closed.
- Avoid unnecessary outdoor air entering the building.
- Avoid activities that generate additional indoor particles.
A cleaner indoor environment can reduce exposure when outdoor particulate concentrations are high.
3. LIMIT OUTDOOR PHYSICAL ACTIVITY
Avoid unnecessary outdoor exercise during severe dust conditions.
Physical activity increases breathing rate, which can increase the amount of airborne particles inhaled.
4. USE APPROPRIATE RESPIRATORY PROTECTION
When outdoor exposure cannot be avoided, a properly fitted particulate respirator can provide better protection than ordinary cloth coverings.
The appropriate type depends on local public-health guidance and the specific exposure.
A loose-fitting cloth mask should not be assumed to provide the same protection as a properly fitted particulate respirator.
5. PROTECT YOUR EYES
If you must go outdoors:
- Wear protective glasses or goggles where appropriate.
- Avoid rubbing your eyes.
- Keep contact lenses clean and consider removing them if they become irritating.
6. DRINK ENOUGH WATER
Dusty, hot and windy conditions can occur together.
Maintain adequate hydration, particularly during hot weather.
However, drinking water does not remove inhaled particles from the lungs, so reducing exposure remains the main protective measure.
SAFETY FOR DRIVERS
Driving during a severe dust storm can be extremely dangerous because visibility may deteriorate rapidly.
If you encounter a dust storm while driving:
- Slow down carefully.
- Increase your following distance.
- Avoid sudden braking or lane changes.
- Look for a safe location away from traffic.
- If visibility becomes dangerously poor, pull completely off the roadway where possible.
- Stop in a safe location and wait for conditions to improve.
- Follow local emergency and road authority instructions.
Do not continue driving blindly through a dense dust cloud.
WHY DRIVING THROUGH A DUST STORM IS DANGEROUS
A driver may suddenly be unable to see:
- Vehicles ahead
- Vehicles behind
- Pedestrians
- Road edges
- Traffic signals
- Obstacles
- Road markings
Even a relatively slow vehicle can become involved in a serious collision when visibility is extremely poor.
WHAT TO DO AFTER A DUST STORM
The storm may end, but airborne particles can remain suspended or settled around the environment.
1. CHECK AIR QUALITY
Continue monitoring air-quality information before returning to prolonged outdoor activity.
2. CLEAN YOUR HOME CAREFULLY
Use appropriate cleaning methods to remove settled dust.
Avoid unnecessarily stirring large amounts of dust back into the air.
3. CLEAN EYES AND SKIN
If dust gets into your eyes, rinse them with clean water rather than aggressively rubbing them.
Wash exposed skin after significant dust exposure.
4. CHECK VEHICLES
Remove accumulated dust from:
- Windows
- Mirrors
- Air intakes
- Other exposed surfaces
Ensure visibility is restored before driving.
LONG-TERM WAYS TO REDUCE DUST STORMS
Dust storms are natural phenomena and cannot be completely eliminated. However, land-management practices can reduce the amount of loose soil available for wind erosion.
1. PROTECT VEGETATION
Plants help stabilise soil.
Protecting grasslands, shrubs and other vegetation can reduce exposed soil.
2. PREVENT DEFORESTATION
Removing vegetation exposes soil to wind and water erosion.
Protecting vegetation can therefore contribute to better soil stability.
3. IMPROVE AGRICULTURAL PRACTICES
Sustainable farming practices can help maintain soil structure and reduce erosion.
4. REDUCE OVERGRAZING
Excessive grazing can remove vegetation cover and expose soil.
Proper grazing management can help maintain vegetation and soil stability.
5. CONTROL LAND DEGRADATION
Restoring degraded land can reduce the amount of loose material available for wind erosion.
WHO identifies land degradation, deforestation, unsustainable land management and water mismanagement as human-related factors associated with dust emissions.
6. IMPROVE EARLY-WARNING SYSTEMS
Communities can benefit from:
- Weather monitoring
- Satellite observations
- Air-quality monitoring
- Dust forecasting
- Public alerts
- Transport warnings
Early warnings allow people to reduce outdoor exposure and help authorities prepare for transportation and public-health impacts.
WHO IS MOST VULNERABLE?
Everyone can be affected by severe dust exposure, but some groups may face greater health risks.
These include:
- Infants and children
- Older adults
- People with asthma
- People with COPD
- People with heart disease
- People with other chronic respiratory or cardiovascular conditions
- People who work outdoors
WHO notes that particulate pollution can have particularly serious effects on people who already have respiratory or cardiovascular disease.
WHEN SHOULD YOU SEEK MEDICAL HELP?
Seek medical attention if significant dust exposure is followed by concerning symptoms such as:
- Severe difficulty breathing
- Persistent or worsening wheezing
- Chest pain
- Severe shortness of breath
- Fainting
- Significant worsening of an existing respiratory condition
People with asthma or other chronic respiratory diseases should follow their prescribed medical action plans and seek care when symptoms are not adequately controlled.
WHAT NOT TO DO DURING A DUST STORM
❌ Do not stay outdoors unnecessarily.
❌ Do not exercise outdoors during severe dust conditions.
❌ Do not drive through extremely poor visibility.
❌ Do not ignore official dust or air-quality warnings.
❌ Do not rub irritated eyes aggressively.
❌ Do not assume ordinary cloth coverings provide the same protection as a properly fitted particulate respirator.
❌ Do not allow vulnerable family members to remain unnecessarily exposed.
❌ Do not resume prolonged outdoor activities immediately if air quality remains poor.
DUST STORM SAFETY CHECKLIST
BEFORE A DUST STORM
✔ Check weather forecasts.
✔ Monitor air-quality information.
✔ Prepare essential medicines.
✔ Keep windows and doors ready to close.
✔ Prepare suitable air filtration if available.
✔ Protect vulnerable family members.
✔ Plan how to reduce outdoor exposure.
DURING A DUST STORM
✔ Stay indoors when possible.
✔ Keep windows and doors closed.
✔ Reduce outdoor activity.
✔ Protect your eyes and respiratory system when exposure is unavoidable.
✔ Avoid unnecessary driving.
✔ If driving, stop safely if visibility becomes dangerously poor.
✔ Follow official warnings.
AFTER A DUST STORM
✔ Check air quality before going outdoors for extended periods.
✔ Clean dust carefully.
✔ Rinse irritated eyes with clean water.
✔ Clean vehicles and outdoor equipment.
✔ Continue monitoring official information.
✔ Seek medical attention for serious breathing problems.
CONCLUSION
Dust storms are powerful environmental hazards caused mainly by strong winds interacting with dry, exposed and easily eroded ground. Drought, land degradation, deforestation, overgrazing and unsustainable agricultural practices can increase the availability of loose soil and therefore contribute to dust emissions.
The greatest immediate dangers are often poor air quality, respiratory irritation, cardiovascular effects and severely reduced visibility. Fine particulate matter can penetrate deeply into the lungs, making prolonged or intense exposure a significant health concern.
The most effective personal protection is to reduce exposure: stay indoors during severe events, keep indoor air as clean as possible, monitor official air-quality information, protect vulnerable people and avoid unnecessary travel.
At the community level, vegetation protection, sustainable land management, erosion control, dust monitoring and early-warning systems can help reduce the impacts of dust storms.
KEY SAFETY MESSAGE
WHEN A DUST STORM ARRIVES, REDUCE YOUR EXPOSURE, PROTECT YOUR LUNGS AND EYES, AVOID DANGEROUS DRIVING CONDITIONS, AND FOLLOW OFFICIAL WEATHER AND AIR-QUALITY WARNINGS.
Sand and dust storms can travel far beyond their source regions, so early warning, public awareness and appropriate safety measures are essential for protecting health and reducing disruption.
