Rodent activity appears to be increasing across the UK, with analysis of data recorded by Rentokil Pest Control revealing a 10% year-on-year increase in confirmed pest activity, and large regional spikes in Northern Ireland and Northern England.
Full year data recorded in 2024 (Jan-Dec) and 2025 (Jan-Dec) highlightd the UK’s regional rodent hotspots.
Northern Ireland recorded the largest year-on-year increase (26%), followed by Yorkshire (20%) and North West England (19%). Several other regions, including the West Midlands (16%) and Scotland (14%), also saw double-digit rises.
Longer-term climate patterns may be contributing to the upward trend. Both 2024 and 2025 were significantly above temperature averages, with 2025 being the UK’s sunniest and warmest on record. These conditions can increase rat reproduction, as milder weather extends their breeding season and can lead to larger populations.
Pairing this against the backdrop of a record-breaking wet start to 2026, Rentokil Pest Control is warning that we could see higher levels of reported rat activity.
Sustained heavy rain can flood burrow systems and drainage networks, displacing rats and increasing the likelihood of infestations as they seek higher, drier shelter.
“Rats are highly capable swimmers”, comments Paul Blackhurst, head of Technical Academy at Rentokil Pest Control.“They can navigate strong currents, enter exposed pipes and sewers, and swim considerable distances in open water. However, what they cannot tolerate is prolonged submersion.
“When burrow systems and sewer networks flood, rats are forced to seek higher, drier ground, increasing the risk of infestations in properties.”
Preventing rat infestations after storms
Following periods of heavy rain, storms and flooding, property owners are advised to take proactive steps to reduce the risk of rodent activity. To minimise risk, Rentokil Pest Control advises:
Clear debris promptly
Remove fallen branches, leaves, and other debris that may have accumulated around your property, as these create ideal hiding and nesting spots for rats.
Seal potential entry points
Inspect the walls and foundations of your property for gaps, as rats can squeeze through surprisingly small openings.
Remove the food source
Ensure outdoor bins are sturdy, fitted with tight lids and positioned away from building walls where possible. Limiting accessible food sources makes properties far less attractive to rodents.
Mr Blackhurst added: “With northern regions already reporting notable increases in reported activity, continued wet weather may push more rats into properties. Early prevention and professional support are key.
“Simple steps such as proofing entry points, managing waste effectively and responding quickly to early signs of activity can make a significant difference. If a problem does become unmanageable, professional pest control experts are always on hand to provide safe and effective solutions.”
