An urgent warning issued to drivers as ‘thunder fever’ will land motorists in trouble with the law and could result in £5,000 fines.

Drivers have been warned before about “thunder fever” and the potential issues it could cause them while driving. The recent hot weather has worsened hay fever and asthma for some sufferers, which could impact their driving.

The term “thunder fever” is linked to lightning and thunderstorms with elevated pollen counts across the UK. This happens when moisture and lightning brought by a storm shatter pollen molecules that usually are too large to enter the lungs, thus meaning more hay fever and asthma symptoms.

Know the law

Drivers need to know that operating a vehicle while suffering from hay fever or asthma symptoms could result in hefty fines. Especially if symptoms such as sneezing, suffering from a runny nose, or watery eyes lead to dangerous driving.

Considering the Government’s legislation that bans driving while under the influence, it is essential to know that it does not distinguish between illicit, prescription, and over-the-counter medications. This can mean any drug that affects your driving could potentially result in an unwanted drug-driving conviction.

Approximately 16 million people in the UK suffer from hay fever, and all could be unaware of the issue surrounding asthma and hay fever medication.

Check your local weather.

Greg Wilson of said: “The weather has been really extreme this summer, and driving such heat alone has been very challenging, but there are things drivers need to know to avoid risking penalty points or fines and keep safe on the roads.

If a storm is predicted locally, look at official flood warnings, avoid roads likely to flood and allow more travel time. Some drivers may have to pull over and wait it out if the downpour affects their visibility, and don’t forget that drivers can also catch a fine if they can’t see clearly out of all windows. It is important to ensure your de-mister is working and windows are clear from condensation.

Mr Wilson added: “Hay fever symptoms can happen unexpectedly, with certain types of medication causing drowsiness, or carrying a ‘do not operate heavy machinery warning.”

“If a driver fails to obey this warning and decides to drive anyway, they could risk a significant fine of up to £5,000, points on their licence and endanger themselves and other road users.”

Check your medication

If you use any antihistamine or asthma medication, it is wise to check the box for warnings regarding driving. You don’t want to end up with court proceedings for driving under the influence of drugs, even if it is just hay fever medication.