Thunderstorm asthma season is here: what you need to know
South-eastern Australia faces its high-risk period for thunderstorm asthma as grass pollen peaks in November. Thunderstorm events can rupture pollen grains into tiny sub-pollen particles (SPPs) that travel on storm winds and are easily inhaled at ground level. For people with asthma or hay fever, these conditions can trigger rapid, severe symptoms. Being prepared can reduce the risk of severe attacks during this challenging season.
Understanding the risk
Grass pollen, particularly ryegrass, is a common trigger in this region. Rain and moisture during storms cause pollen to swell and rupture into SPPs. Wind then carries these particles downward, increasing exposure for people while outdoors or even indoors if windows are open. Thunderstorm asthma events are well documented in Victoria and other south-eastern states, underscoring the need for proactive management.
What asthma sufferers should do now
Asthma Australia urges people with asthma or hay fever to take concrete steps this season. A key message is to check asthma control with a GP. Ensure you are using your preventer inhaler daily as prescribed and that you have an up-to-date Asthma Action Plan that outlines how to respond if symptoms worsen.
For those who rely on a blue reliever inhaler, be aware that modern guidelines emphasize the use of anti-inflammatory relievers that combine preventer and reliever medications. If your plan relies solely on a blue reliever, discuss adjustments with your GP to align with best practice and improve protection during high-risk days.
People with hay fever should also prepare, as pollen sensitivity can trigger asthma-like symptoms even in those without a formal diagnosis. If you notice wheeze, night-time coughing, or shortness of breath on high pollen days, schedule a GP visit to assess for asthma and discuss treatment options.
Daily monitoring and practical steps
You don’t have to guess when risk will be high. Use real-time pollen forecasts and alerts to plan your day. The AirRater app provides current pollen levels and weather conditions, helping you avoid peak exposure on forecast storm days. Stay informed by checking the National Pollen Forecast Service at PollenForecast.com.au and the AirRater app.
On days with high pollen and storm risk, practical precautions can make a difference: stay indoors when possible, keep windows and doors closed, and have your reliever inhaler readily accessible. If you have an action plan, follow it and reach out to your GP if symptoms escalate.
Know who is at risk
Adults and children with asthma that is poorly controlled, those with undiagnosed asthma-like symptoms (wheezing, shortness of breath, night coughing), and people with hay fever sensitive to ryegrass pollen are all at increased risk during thunderstorm events. Early assessment and ongoing management are essential for safety.
Preparing Victorians for the season
Asthma Australia recommends a practical checklist: review asthma control with your GP, use your preventer daily as prescribed, and keep an up-to-date Asthma Action Plan. Keep your reliever inhaler close, manage hay fever with appropriate nasal treatments, and stay informed with reliable pollen forecasts. On storm days, indoors and protected environments can reduce exposure while maintaining access to medications.
By taking these steps now, you can better protect yourself and loved ones during the thunderstorm asthma season in south-eastern Australia.
