Web searches for false widow spiders have surged by 5,000% across the UK following last week's blistering heatwave, prompting experts to issue warnings about the species invading homes.
Hospital Admissions Double
NHS figures reveal that hospital admissions linked to spider bites have more than doubled over the past decade. A Freedom of Information request showed that 100 people required hospital treatment for spider bites in 2025, double the 47 cases recorded ten years ago.
Expert Warnings
Oxford University ecologist Clive Hambler warned: "The days when you could just treat spiders as benign in Britain are over." He described the noble false widow as "the most dangerous spider currently breeding in Britain."
Experts attribute the spike in sightings to prolonged heatwaves that accelerate breeding in outdoor habitats. When temperatures suddenly drop, booming spider populations force their way indoors through gaps around window frames and door seals.
Prevention Tips
Garden expert Luke Newnes said: "A sustained hot spell is good news for false widows - warm conditions speed up breeding and push population numbers higher than normal." He added that the subsequent cool-down drives them inside seeking warmth.
Homeowners can prevent entry by checking and resealing window frames with exterior-grade silicone costing around £5. Replacing worn threshold seals and cutting back ivy from walls also helps block their path indoors.
