Fear of West Nile Virus outbreak after experts say this week’s heavy rain could bring increase in mosquitoes to Houston area 3 ways to protect yourself from mosquitoes Re'Chelle Turner, KPRC Tags: West Nile Virus concerns as week of rain brings out more mosquitoes HOUSTON – After this week’s heavy rain, the Harris County Public Health Mosquito and Vector Control Division said we could see a slight increase of mosquitoes across our area. On Friday, The Division added 11 positive mosquito samples for the West Nile Virus, bringing the total number to 42 this year. Last month, the first sample was found in the Willowbrook area.