Are Rats Dangerous? Health Risks and Damage Explained

Rats are not just an unpleasant nuisance. They live in drains, bins and soil, then walk across your worktops. That combination is why they are treated seriously.

This guide explains the main risks to health, property and safety, without exaggeration, and what sensible steps to take if you think rats are around.

Contamination of food and surfaces

The most important risk is contamination. Rats leave droppings, urine and hair as they travel, and they gnaw into packaging. Any food that rats may have touched should not be eaten, and open food in the area should be thrown away.

Wash surfaces with hot soapy water and then a household disinfectant, wearing gloves. Do not sweep or brush dry droppings, as this raises dust. If you run a business that handles food, contamination can also create serious problems with inspections, so act quickly.

Pet food bowls, bird seed stores and open bins are common contact points, so keep them covered and tidy while you wait for treatment.

Illness linked to rats

Rats can carry bacteria and other organisms that cause illness in people, and these can spread through contaminated food, water and surfaces, or through contact with their urine. Bites and scratches are uncommon but should be washed and checked by a medical professional.

If you or a family member feels unwell after known contact with rats or their droppings, speak to a pharmacist or your GP and mention the exposure. Pregnant people, young children, older people and anyone with a weakened immune system should take extra care.

Illness from rats is not inevitable, and most people who find signs are not harmed. The point is that sensible hygiene and prompt action keep the risk low, and it is better not to take chances with food preparation areas.

• Wear disposable gloves when cleaning
• Wash hands thoroughly afterwards
• Keep children and pets away from droppings and nests
• Do not touch dead rats with bare hands

Fire risk and damage to the building

Rats gnaw continuously, and cables are a frequent target. Damaged insulation on wiring can expose live conductors, which is a potential fire hazard in a loft, a wall void or under floors. Gnawed water and waste pipes can leak, and chewed insulation reduces how well a loft keeps heat in.

Rats also burrow beside foundations, under slabs and around drains, which can undermine paths and patios or damage drainage. If you find chewed wiring, switching to a qualified electrician is sensible.

Insulation is often shredded for nesting material, and in lofts this can spread droppings and urine through a large area. Water tanks without a tight lid should be checked as well, as rats can get into them.

Risks to pets and children

Pets may hunt or eat rats, and may be exposed to droppings or bait laid elsewhere. Children playing in gardens can come across burrows, droppings or dead animals. Make sure everyone knows not to touch them.

This is one reason it is unwise to use over-the-counter bait without care. Products that kill rats can also harm other animals, and a poisoned rat can be picked up by a pet.

Check gardens before children play, especially around sheds, compost bins and long grass, and keep dogs on a lead near any suspected burrows until the area has been looked at.

Why speed matters

A small number of rats can become a large population quickly, so waiting often makes things worse. Early action usually means a simpler, shorter treatment.

If you suspect rats, store food securely, record what you have seen and arrange an inspection. Essex Pest Solutions can identify the signs, explain the risks for your situation and advise next steps. Cost depends on the extent of activity and the property.

A tenant, landlord or business owner may each be affected differently, so check your tenancy agreement or official guidance about who typically arranges treatment.

Frequently asked questions