Heat wave raises risk of West Nile Virus

Health officials want to be generous with the bug spray during the heat wave that's settling over Minnesota. Late summer heat creates ideal conditions for the mosquitoes that carry West Nile Virus. In the Twin Cities, the mosquito control district is chemically treating 77,000 storm drains.
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Health officials want to be generous with the bug spray during the heat wave that's settling over Minnesota. Late summer heat creates ideal conditions for the mosquitoes that carry West Nile Virus. In the Twin Cities, the mosquito control district is chemically treating 77,000 storm drains.

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Hot weather a factor in Minnesota's worst West Nile season in five years

State health officials say cases of West Nile Virus are at their highest level in at least five years. The mosquitoes that carry the virus flourish is the hot weather that blanketed Minnesota in July. Some of those infected with West Nile don't show symptoms of illness. But if the virus develops into encephalitis it can be fatal.