Thunderstorm asthma occurs when certain weather conditions combine with high pollen levels, causing pollen grains to break into smaller particles that may be inhaled deeper into the airways and trigger asthma symptoms. It is most closely linked to spring grass pollen season in NSW, when storms can affect people with asthma, hay fever or pollen sensitivity.
This guide explains what thunderstorm asthma is, who may be more likely to experience symptoms, and how to prepare before spring weather arrives.
Quick Answer
Thunderstorm asthma is triggered when thunderstorms interact with high grass pollen levels, creating smaller pollen particles that may worsen asthma symptoms in some people.
Key Takeaways
- Thunderstorm asthma is linked to high pollen levels combining with certain storm conditions.
- People with asthma, hay fever or pollen sensitivity may be more likely to experience symptoms.
- Preparation includes reviewing your asthma plan and understanding your triggers.
- Symptoms include wheezing, coughing, chest tightness and shortness of breath.
- Severe or worsening breathing difficulty needs urgent medical attention
What Is Thunderstorm Asthma?
Thunderstorm asthma describes asthma symptoms that can be triggered when certain weather conditions interact with airborne grass pollen. During some storms, pollen particles can break into smaller fragments that are more easily inhaled and may reach deeper into the airways.
This can affect people who already have asthma, as well as some people with hay fever or pollen allergies who have not previously experienced significant asthma symptoms. Not everyone exposed to these conditions will develop symptoms, and individual risk varies.
Why Does Spring Increase Thunderstorm Asthma Risk in NSW?
Spring brings the grass pollen season across much of NSW, which increases the amount of airborne pollen at the same time that storm activity becomes more common. This combination is what creates conditions associated with thunderstorm asthma events.
Factors that can contribute include:
- High grass pollen counts during spring months
- Strong wind gusts ahead of a storm front, which can spread pollen more widely
- Humidity and storm conditions that may affect pollen particles
- Being outdoors during or immediately before a storm
For people living in Paterson and surrounding Hunter Region communities, spring pollen levels can be an important seasonal consideration if you experience asthma or hay fever symptoms.
Who Is More Likely to Experience Thunderstorm Asthma Symptoms?
Certain groups may be more likely to notice symptoms during thunderstorm asthma conditions, including:
- People with diagnosed asthma
- People with hay fever or allergic rhinitis
- People with known grass pollen sensitivity
- Children with allergic conditions such as eczema or asthma
- People with seasonal allergy symptoms or previous breathing symptoms linked to pollen exposure
- Outdoor workers and people who spend significant time outside during spring
Having one of these risk factors does not mean symptoms will definitely occur, but it is a reason to stay aware during high pollen periods.
What Symptoms Should You Watch For?
Symptoms can vary between individuals and may develop quickly during a thunderstorm asthma event. Common symptoms include:
- Wheezing or a whistling sound when breathing
- Persistent coughing
- Chest tightness or discomfort
- Shortness of breath
- Difficulty breathing that comes on quickly
Symptoms can sometimes occur in people without a previous asthma diagnosis, particularly those with pollen sensitivity or allergic conditions. Being aware of these signs during spring storm season can help you respond appropriately.
How Can You Prepare for Thunderstorm Asthma This Spring?
Preparation is one of the most practical steps you can take, particularly if you have asthma or hay fever.
Before storm season:
- Review your asthma action plan with your GP if you have one
- Understand your personal triggers, including pollen sensitivity
- Keep prescribed reliever and preventer medicines available and within date
- Monitor local pollen forecasts during spring
During high pollen weather or approaching storms:
- Follow the guidance in your asthma action plan
- During periods of high pollen levels or thunderstorm asthma alerts, some people may choose to reduce outdoor exposure if this is a known trigger for their symptoms.
- Monitor for early symptoms such as coughing or wheezing
- Have reliever medicine easily accessible
These steps do not guarantee that symptoms will not occur, but they can help you respond more confidently if they do.
Can hay fever increase the risk of thunderstorm asthma symptoms?
Yes. People with hay fever (allergic rhinitis) or grass pollen sensitivity may be more likely to experience breathing symptoms during thunderstorm asthma conditions. During certain storms, pollen particles can become smaller and may be inhaled deeper into the airways, which can trigger symptoms in some people.
Having hay fever does not mean you will definitely develop thunderstorm asthma symptoms. If you notice coughing, wheezing, chest tightness or shortness of breath during spring or around high pollen periods, speaking with a GP can help assess your symptoms and discuss appropriate next steps.
When Should You Speak With a GP About Asthma Symptoms?
Consider discussing your symptoms with a GP if:
- Your asthma symptoms are becoming more frequent
- Your usual asthma control has changed recently
- You have concerns about your current medications or inhaler technique
- Seasonal symptoms are affecting your daily activities or sleep
- You have hay fever and are unsure whether your breathing symptoms need assessment
Discuss your asthma symptoms or seasonal breathing concerns with a GP for an assessment of respiratory symptoms to understand what support may be suitable for you.
What Happens During an Asthma Review With a GP?
An asthma review is a straightforward consultation. Your GP may cover:
- Symptom discussion: how often symptoms occur, what triggers them and how they affect your daily life
- Medical history review: your asthma history, hay fever and any other relevant conditions
- Medication review: checking your current medicines, doses and inhaler technique
- Management planning: discussing whether an asthma action plan should be created or updated
This gives your GP a clear picture of your overall respiratory health, not just your symptoms during spring.
Thunderstorm Asthma Support in Paterson NSW
Patients in Paterson who have asthma, hay fever or seasonal breathing concerns can discuss their individual risk and management with a GP ahead of spring. This may include reviewing your asthma action plan, medication and any recent changes in symptoms.
If you have concerns about asthma symptoms during spring, contact Paterson Healthcare to arrange a GP appointment.
FAQs
What causes thunderstorm asthma?
Thunderstorm asthma is linked to certain weather conditions combining with high grass pollen levels. Pollen particles can break into smaller fragments during some storms, making them easier to inhale and potentially triggering asthma symptoms.
Can thunderstorm asthma affect people without diagnosed asthma?
Yes. Some people with hay fever or pollen sensitivity who have not previously had significant asthma symptoms may still experience breathing symptoms during thunderstorm asthma conditions and should discuss any concerns with a healthcare professional.
How can I prepare for thunderstorm asthma season?
Preparation includes reviewing your asthma action plan, understanding your personal triggers, keeping prescribed medicines available, and monitoring pollen forecasts during spring, particularly ahead of storms.
When should I see a GP for asthma symptoms?
See a GP if your symptoms are becoming more frequent, your asthma control has changed, or seasonal symptoms are affecting your daily activities. Seek urgent medical care for severe or rapidly worsening breathing difficulty.
Resources and References
- Healthdirect Australia – Asthma
- National Asthma Council Australia – Thunderstorm Asthma
- NSW Health – Thunderstorm Asthma Information
- Asthma Australia – Asthma Management Resources


