We usually associate destructive pests with summer, but it doesn’t mean that they go away completely during winter. Rodents work to find their way inside your Texas home during the colder seasons— believe it or not, they want to get warm and cozy, too! While most of us want to lay low and stay indoors due to the cold temperature, rats and mice have to seek out food supplies and warm nesting spots. This is why you need to be alert for possible winter infestations. Even though it may not be snowing outside, they’re on the prowl when the temperatures drop.

Mice Behavior During Winter Season

Many people don’t realize the threat mice, rats, and other rodents bring to properties during the winter season. They look for food and shelter during the colder months, often entering structures through small holes and gaps. This means they can thrive right under our noses. The biggest concern here is that these pests can spread illnesses and cause serious property damages. They also carry fleas and ticks which can lead to secondary infestations and spread diseases.

Mice look for warm spots.

While some mice prefer staying inside outdoor burrows, others seek warmer locations near an abundant food source. Your garage, walls, basement, and attics give them everything they need—it’s like they’ve found prime real estate.

Mice do not hibernate

Mice are active all year round, most especially during the colder months. They don’t hibernate and are not well-equipped for cold climates. This is why they continue moving around, looking for food, and good nesting spots. And because the winter season makes most outdoor options unbearable for mice, they start seeking out homes and building spaces.

Mice begin scrounging for food

Rats and mice usually stay outdoors where it’s warm, and the food source is plentiful. But, as the weather gets colder, food becomes scarce. Rodents prepare for this by gathering and storing as much as they can—they stockpile food to lessen the need to get out of their burrows. They gather food such as seeds, nuts, vegetables, and just about anything they can to prepare for the winter season. They also use cloth, feathers, and whatever is available to insulate their spaces.

Mice set up their nests

Mice want to rest and nest in warm areas during the cold season. They usually prefer to live far from human activity—but most of the time, they have no choice but to seek shelter in homes and businesses. Once they get indoors, they tend to build nests in dark areas like inside cabinets, storage boxes, and closets. Make sure to watch out for any droppings and chew marks around your home!

Dangers Of Mice And Rats

Rodents like rats and mice directly spread diseases and cause serious property damages. Accumulated feces from these rodents can contaminate food and trigger allergic reactions, making your home unsanitary. Even worse, when the fecal matter dries up, it becomes dangerous to inhale. Moreover, they can also carry ticks and fleas that can transmit secondary infections.

Structural Damage

mice-damaged cords

Rats and other rodents need to chew on various hard materials to keep their incisor teeth in check. Watch out for gnawing marks on furniture pieces, walls, and other things around your home. Chances are, you’ll see mangled bin bags, shredded cardboard, and other fibrous materials around. Mice usually chew on different items they consider as good nesting materials. 

Diseases directly transmitted by rats

Rat-bite Fever

Rat-bite, a.k.a. Haverhill fever, may be transmitted through a simple scratch, bite, or even contact with a dead rat. You’ll see symptoms about a week and a half at the latest. This “fever” is actually a bacterial infection spreading across your body, and it’s fatal in 20% of cases.


People usually get salmonellosis by consuming water or food contaminated by rat feces bacteria. It normally goes away on its own, but you can take some probiotics like yogurt for the stomach cramps and diarrhea.

Hantavirus Pulmonary Syndrome

Hantavirus Pulmonary Syndrome is a viral illness transmitted by rice rats. A person can get it by inhaling dust contaminated with rat droppings, urine, or direct contact with rat waste. On rare occasions, you can also get infected by Hantavirus because of a rat bite. 


This is a bacterial illness transmitted by coming into contact with infected water. It doesn’t matter whether you’re drinking it or swimming on it—make sure to get a check-up if you come into contact with unclean water like sewage or floods. 

Diseases indirectly transmitted by rats

Mice, rats, and their parasites may carry several diseases, some of which are potentially deadly to humans. 

Cutaneous Leishmaniasis

This parasitic disease gets transmitted by sandflies that previously fed on wild woodrats. The bites cause skin sores, and the resulting symptoms depend on their location:

  • Difficulty breathing
  • Skin sores, or consequently, ulcers that take a long time to heal 
  • Stuffy or runny nose and nosebleeds
  • Difficulty with swallowing
  • Erosions in your tongue, nose, and mouth


Domestic rats are the most common carriers of the bubonic plague— fleas transmit it after they take a blood meal. It’s the most common type of plague and has a 30 to 60% mortality rate if you don’t detect it early on. You’ll experience symptoms such as fever, exhaustion, head pain, and swollen lymph nodes. And in really bad cases, you will bleed.

Colorado Tick Fever

Colorado Tick Fever is a viral disease transmitted by a tick after a blood meal from a bushy-tailed woodrat. It’s not life-threatening but can be quite an inconvenience. You’ll potentially experience symptoms such as chills, head and body pains, fever, and exhaustion. 

a wild rat on the kitchen sink

Signs Of A Mouse Problem 

  • Droppings
  • Scratching noises
  • Footprints
  • Gnaw Marks
  • Holes and damages
  • Nests

Tips To Prevent Mice This Winter

  • Seal all possible entry points.
  • Keep your kitchen and other food preparation areas clean.
  • Keep your garden plants trimmed and tidy.
  • Keep potential outdoor shelters like stones, bricks, and piles of wood far from your home’s foundation.

If you live in Baytown, Texas and need pest control, call Big Dave. We service Baytown and the surrounding areas.