Barwon Health is encouraging locals to make sure they are prepared, with a moderate risk of epidemic thunderstorm asthma forecast.
The local health authority says it increases the risk of people having asthma symptoms and breathing issues because of high grass pollen level and storms.
Geelong is expected to have showers and a possible storm today, with a top of 24.
Anyone who is worried about the conditions are being urged to be alert of the local weather conditions.
Barwon Health says it is also important to stay inside and keep doors and windows closed if there is a storm, and people should have their asthma medication with them at all times.
Anyone needing emergency help should call 000.
Picture: File image [Barwon Health]