Health agency warns of mosquito outbreak after major flooding
Aug 27, 2026
NOBLESVILLE, Ind. (WRTV) Residents in areas that flooded may have another battle ahead: mosquitoes.Flooding caused the White River at Noblesville's Logan Street Bridge to crest at a record high of 24.6 feet at 3 a.m. Aug. 15. T
he river flooding also caused a creek to reverse course in Carmel, leading to a bridge collapse and the redirection of nearly 9 billion gallons of water.In Hamilton County, a vector control team of the Hamilton County Health Department was monitoring and treating flood-hit communities. However, the department said in a Thursday news release that mosquito control requires a community effort across thousands of properties.Jason LeMaster, administrator of the health department, said the flooding provided a reprieve by washing away standing water, but receding waters are now creating new breeding grounds.Mosquitoes breed in small amounts of water found in buckets, flowerpots, toys, tarps, gutters, tires, wheelbarrows and birdbaths.Health officials encourage residents to walk around their property to tip, toss or drain anything that holds water. They recommend that be done at least once a week on every property in Hamilton County.Residents also should scrub birdbaths and pet dishes regularly and clear gutters to ensure water flows properly.To prevent bites, the department said, use an insect repellent registered with the U.S. Environmental Protection Agency and wear long sleeves and pants when outdoors.LeMaster warned that while most post-flood mosquitoes are just a nuisance, Indiana still faces risks from species that carry the West Nile virus.The health department, which serves the entire county except for the city of Fishers, noted its first mosquito sample to test positive for West Nile virus was found in early July at Founder's Park in Carmel.
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