The UK's third heatwave of the year has created conditions increasingly favourable to Aedes aegypti, a mosquito species that can spread diseases such as dengue fever, yellow fever, and the intensely painful chikungunya. Mosquito bites are irritating, and for those with 'skeeter syndrome'—a severe inflammatory response to mosquito saliva—they can ruin summer evenings.
Rising mosquito threat in the UK
UK online searches for 'yellow fever mosquito' have rocketed by 5,000% during the past week. Health Security Agency (UKHSA) monitoring has identified more than one instance of the invasive species appearing in the UK. Mosquito eggs were discovered at a freight storage facility near Heathrow Airport in 2023, and a related invasive species, the Asian tiger mosquito, was found at a motorway service station in Kent in 2024.
The yellow fever mosquito reproduces most rapidly in warm, humid conditions, with eggs capable of hatching within days once water temperatures remain consistently warm. Areas of southern England have seen temperatures rise into the low-to-mid 30s Celsius, with warm, humid nights providing standing water in gardens minimal opportunity to cool.
Simple homemade repellent
There is one method of stopping mosquitoes from getting into your home, and it requires an inexpensive ingredient you may already have. Cloves contain eugenol, a natural compound recognised for disrupting mosquito behaviour. All you need to do is slice a fresh lemon in half, and insert 10-15 cloves into the exposed flesh. Then position your homemade mosquito repellent onto a plate near windows or doorways. The blend of sweet, spicy and acidic aromas appears to confuse or deter mosquitoes.
Garden tips to prevent breeding
Garden expert Luke Newnes at Hillarys says there are three swift ways homeowners can prevent their gardens becoming a breeding ground. He explains: 'A prolonged hot spell followed by muggy, still nights is exactly the kind of weather that lets mosquito eggs develop quickly, and most gardens are unknowingly full of the standing water they need.'
His three quick fixes: fit a secure lid or fine mesh cover over water butts and large water storage so mosquitoes can't reach the surface to lay eggs; empty containers every 3-4 days to break the life cycle before it completes; and check gutters, downpipes, dips in paving or tarpaulins after rain to remove pooled water.
You should also consider installing a fly-screen on external doors to reduce the likelihood of mosquitoes entering your home.
