Cats do get cold. As mammals, cats, despite their protective fur, are still susceptible to cold and require proper protection from the chill. Kittens, in particular, are unable to adapt to the winter temperatures and are prone to death. If the mother cat is nearby, it's best to provide her and the kittens with adequate warmth. If the mother cat is not around, it's advisable to use air conditioning to maintain a warm environment and prevent kittens from dying from excessive cold. In the wild, the frigid winter temperatures can be fatal to cats. However, there's no need to worry excessively; cats are not as vulnerable to cold as we might imagine. 
How to keep a cat warm if it's sensitive to cold
1. It is essential to prepare a windproof cat bed for your cat. Place the cat bed in a dry, sheltered location, and take it out to sunbathe when it's sunny. You can line the cat bed with a soft blanket.
2. You can use an air conditioner or heater to raise the indoor temperature. If you are using a heater or electric heater at home, try not to let your cat get too close to avoid prolonged exposure to the heat and potential burns. Too much heat can also damage your cat's fur.
3. Feed your cat warm water and hot food whenever possible, and give it plenty of high-protein foods to help supplement its nutrition.