HOUSTON – With cold temperatures headed to the Greater Houston area, a local medical professional asked people to continue to exercise precautions indoors. She noted viruses thrive in colder temperatures. She said the cold weather contributes to a recipe for concern when it comes to spreading viruses. “Most respiratory viruses are able to infect you better at lower temperatures,” Yancey said. We do not want to see another surge in the spring because of these variants,” Yancey said.