Dozens of flights out of Phoenix, Arizona, have been cancelled because of extreme heat.

County health officials have detected a species of mosquito responsible for spreading Zika and other viruses for the first time in Southern Nevada.

Plenty of people have described Hurricane Harvey as a disaster of biblical proportions, and it seems the next plague is upon us. It’s not locusts. Thanks to untold quantities of filthy standing water, millions of mosquitos are starting to hatch. And yes, they do bite. They love to bite.

Locals blame Poolbeg incinerator for infestation in Sandymount and Ringsend

The willow blotch leaf miner appears to be having a banner year in Whitehorse, likely because of hot, dry conditions in the city this spring.

The latest tally of beetle kill shows more than 550,000 acres of forest with dead spruce from the ongoing infestation this year alone, much of it in Mat-Su.

While the airborne ants may be a nuisance, Moscow City Hall’s environmental protection department said they are not dangerous.

The iconic pine trees blanketing Jasper National Park may never be the same as a mountain pine beetle epidemic has infected nearly half of the park's pine forest.

Over the last two years, an outbreak has affected more than 500,000 acres of forest.

The tent caterpillar may be chewing its way through swathes of forest foliage, but there's no danger of harm to trees, says expert.

In just seven years, as much as one-third of the mountain-birch forest in the North Calotte region was severely defoliated by two moth species. Researchers now have a better understanding of what happened.