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... A mix of urban development, climate change, insecticide resistance and genetic adaptations are creating a more hospitable environment for the insects in southern Nevada.

Las Vegas is hardly alone in its battle against the pesky insects. Warmer temperatures and shifting weather patterns are expanding the geographic range in which mosquitoes live and breed. In many ways, what's happening here is playing out across the desert Southwest, and beyond.

The mosquitoes have brought with them not only the nuisance of bug bites, but also the major threat of mosquito-borne diseases such as dengue fever and West Nile virus to Las Vegas and the rest of Clark County. ...