The UK is experiencing a heatwave, but it will rain soon. This might affect people with breathing problems.

The NHS says thunderstorms can make asthma symptoms worse. If this happens, talk to a pharmacist or doctor.

People with inhalers should carry them during thunderstorms. Inhalers help with asthma and COPD.

Asthma is common in the UK. About 8 in 100 people have asthma.

People with asthma must be careful during thunderstorms. Thunderstorms can cause severe asthma attacks.

Asthma + Lung UK says thunderstorms can trigger asthma attacks. This makes symptoms like breathlessness worse.

People are more likely to experience this if:

Asthma + Lung UK says younger adults are more affected by thunderstorm asthma.

Thunderstorm asthma happens when high winds bring pollen and pollution into the air. Then, pollen breaks down into smaller particles when it meets rainwater.

People with asthma should keep their inhalers close during thunderstorms.

When we breathe in these small particles, they can trigger asthma symptoms. This is worse with pollen and air pollution.

If thunderstorms affect your asthma, stay inside and keep your windows closed.

People should carry a reliever inhaler and wear a mask outside to protect against pollen.

For help with asthma, see the summer wellness guide or call 0300 222 5800 for support.