Thunderstorm Asthma Warning in Victoria: Who Is at Risk and How to Prepare

Updated October 31, 2026, Victoria, Australia (AEDT, UTC+11:00). People with asthma or springtime hay fever should prepare for thunderstorm asthma, especially when grass pollen and gusty storms coincide. On Saturday, October 31, VicEmergency published high-risk epidemic thunderstorm asthma advice for Victoria's North East and West and South Gippsland districts. These are location-specific forecasts, not proof that an outbreak has occurred or a nationwide alert. Conditions and official advice may change during the day, so check the current VicEmergency warnings for your suburb before deciding whether to go outside.

What does the October 31 thunderstorm asthma warning mean?

Victoria's North East district advice and West and South Gippsland district advice identify a high risk on October 31, 2026. The Bureau of Meteorology's Victoria forecasts also describe thunderstorms in parts of the state. A thunderstorm forecast alone, however, is not the same as an epidemic thunderstorm asthma risk forecast.

Victoria's Department of Health combines grass-pollen estimates with weather conditions associated with unusual thunderstorm-related asthma events. Its seasonal forecasts run from October 1 through December 31, with ratings of low (green), moderate (orange) and high (red) over a three-day window. The department explicitly notes that a high forecast does not mean an event is certain and that a low forecast does not rule out every attack. The latest district-level forecasts and additional public-health advice are available through Victoria's Department of Health.

What to do now: Check your district and any current health advice, then consider your personal risk and your ability to stay sheltered before and during the gusty period. Do not assume the same alert applies to Sydney, Brisbane or every part of Victoria; consult the responsible local services if you live elsewhere.

Who is at greatest risk?

According to Asthma Australia, the key risk groups include people with current asthma, a previous asthma diagnosis, undiagnosed asthma symptoms, grass-pollen sensitivity and seasonal hay fever. Adults with grass-pollen allergies can develop symptoms even without an established asthma diagnosis. People who have both asthma and hay fever, particularly when asthma is poorly controlled, face increased concern.

Having hay fever does not mean everyone will experience an asthma attack; the risk depends on the person's sensitivity and the conditions. But the possibility of a first episode is why people with significant hay fever should not wait for a known asthma diagnosis to discuss prevention.

Stay inside, change your plans or rely on treatment? Compare the options

There is no single precaution that covers every circumstance. Most people benefit from combining exposure reduction with appropriate medical management rather than treating them as substitutes.

Option 1: Stay indoors before and during the storm

Best for: Anyone at increased risk who can change travel, sports or outdoor work plans. Go inside before the strong winds arrive; shut external doors and windows. Avoid outdoor exercise and waiting in exposed areas while gusts are approaching. If your cooling system draws in outside air, switch that intake off or use recirculation where available. Evaporative air conditioners that bring in outdoor air may need to be turned off during the risk period.

Tradeoff: Staying indoors may disrupt commutes, shifts and family activities, and some buildings need safe ventilation or cooling for other health reasons. If you cannot avoid a journey, plan an enclosed place to shelter, monitor updates and carry your prescribed medication; do not rely on a last-minute run through the storm.

Option 2: Keep asthma and hay-fever treatment on track

Best for: People with existing asthma or seasonal allergies. Use preventers as prescribed and check that you have your reliever, spacer if needed, and written plan. Ask your GP or pharmacist whether your hay-fever treatment is adequate. A preventer manages underlying inflammation; a reliever is for symptoms according to your own plan. Neither makes it safe to ignore a severe weather-related exposure warning.

Tradeoff: Medication choice and inhaler technique are individual. A person using a blue/grey salbutamol puffer may have different first-aid directions from someone using a prescribed anti-inflammatory reliever. Do not switch drugs, start a preventer, or alter doses solely because a forecast appears red. Seek clinician or pharmacist guidance, particularly for children and anyone with frequent symptoms.

Option 3: Track pollen, storms and official warnings

Best for: People who commute, care for others or live near different district boundaries. In Victoria, set a watch zone in the VicEmergency app for the places you live, work or travel. Check the district risk forecast and use Bureau of Meteorology weather warnings and radar to track approaching storms. A pollen count is useful but does not, on its own, describe epidemic thunderstorm asthma risk.

Tradeoff: Forecasts are imperfect and can update; alerts do not replace medical preparation. Victoria's three-day risk forecasting system is not a guarantee that symptoms will or will not occur. The safest approach is to have an action plan even when no current high-risk alert appears.

How to prepare before the next storm: A practical checklist

• Confirm your area: Check current VicEmergency advice and the forecast for your actual location, not merely a social-media screenshot.
• Know your symptoms: Wheezing, persistent coughing, chest tightness and shortness of breath can signal an asthma flare-up. Seek prompt medical assessment for new or worsening symptoms.
• Check supplies: Keep the reliever specified in your plan available, check it is not empty or expired, and have your spacer if relevant.
• Review the plan: Make sure household members, school staff or colleagues know where the written Asthma Action Plan is and what to do.
• Choose a shelter: Plan to be inside with doors and windows closed before gusty winds arrive; pay attention to air conditioners that admit outside air.
• Prepare contacts: For non-emergency advice, contact a GP or pharmacist. For a serious breathing emergency in Australia, call Triple Zero (000).

What if someone starts having trouble breathing?

Call Triple Zero (000) immediately for severe or rapidly worsening difficulty breathing, inability to speak in sentences, bluish lips, collapse, uncertainty about the cause, or an attack when no reliever is available. Do not wait for weather alerts to change or for a full four-minute cycle if the person is severely unwell. If a person has a known severe allergy and sudden breathing trouble, follow their anaphylaxis plan and use an adrenaline autoinjector first if indicated, then follow emergency instructions.

For someone using a blue/grey reliever puffer, Asthma Australia's first-aid approach is to sit the person upright, give four separate puffs using a spacer where available, wait four minutes, repeat if there is no improvement, and call 000 if breathing does not improve; keep giving the specified reliever as instructed while awaiting help. First-aid dosing differs for anti-inflammatory relievers and some other devices. Use the person's written plan or the appropriate medicine-specific instructions on Asthma Australia's asthma first-aid page. Stay with the person and follow the emergency call-taker's directions.

Even if symptoms ease, arrange a medical review as soon as possible after an attack. First aid is not a substitute for clinical assessment, and a severe event can recur.

Answers to three common questions

Is any thunderstorm an asthma emergency?

No. Epidemic thunderstorm asthma involves an uncommon combination of weather conditions and grass pollen. Ordinary storms and general seasonal pollen exposure may still provoke symptoms in sensitive people, but a severe-weather warning and a thunderstorm-asthma risk rating answer different questions. Check both when planning outdoor activities.

Should people without asthma carry an inhaler?

Not automatically. People with seasonal hay fever or possible undiagnosed asthma should ask a GP or pharmacist whether a reliever is appropriate and receive instructions for its use. An inhaler alone does not replace a diagnosis, hay-fever treatment or awareness of emergency signs.

Does a high-risk forecast mean an outbreak is happening?

No. The Victoria forecast indicates an increased chance of an epidemic event; it is not a report of confirmed cases. For October 31, 2026, the verified warnings concern particular Victorian districts. For the current map, timing of updates and any new advice, revisit VicEmergency.

Bottom line

The most useful response to a thunderstorm asthma warning depends on your symptoms, diagnosis, access to shelter and prescribed medication. If you have asthma or grass-pollen hay fever, favor sheltering before gusty storms, maintain the treatment agreed with your clinician and know the correct first-aid instructions. Anyone with severe breathing difficulty needs emergency help, regardless of the forecast color. The October 31 high-risk advice in parts of Victoria warrants preparation, but it should not be mistaken for a confirmed mass asthma event.