People who suffer from asthma may find that their symptoms are getting worse due to the unsettled conditions much of the UK has been experiencing.
Scotland is currently in the midst of a heatwave, but the scorching temperatures can trigger thunderous storms - with several areas of the country under an alert for these today.
And when these summer storms hit during peak pollen season, it can make matters worse for people with asthma or hay fever, who may experience more severe symptoms than usual.
This is called 'thunder fever' or 'thunderstorm asthma', and it's triggered when strong winds whip up the pollen from plants and grass into the air.
A spokesperson from Asthma UK said: "On thundery days some people living with asthma or hay fever might find that their symptoms are triggered or worsened by the weather conditions – this is known as Thunderstorm Asthma.
"Thunderstorm Asthma is caused by high winds drawing higher levels of pollens and pollution particles into the air.
"When the pollen granules come into contact with water, the pollen breaks down into smaller particles that are released into the air.
"These particles are so small that when they are inhaled through the nose and mouth they can get deeper down into the smaller airways in the lungs and trigger asthma symptoms.
"Some airborne allergens involved in thunderstorm asthma are tree and grass pollens and mould spores."
For those who suffer with hay fever, it's likely you'll experience the normal symptoms like itchy eyes, runny nose and sneezing frequently.
But hay fever can make asthma symptoms worse, and the unpredictable weather at the moment can make even the mildest symptoms become more severe.
Asthma sufferers are being advised to stay indoors during stormy weather to avoid attacks, with fears the conditions could be potentially fatal in rare cases.
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