...sometimes it is easy to overlook the not so obvious...
www.nationalgeographic.com
The photos and news from the past month’s devastating fires across parts of the West—charred towns, dramatic helicopter rescues, apocalyptic skies—have provoked fear, anger, and an understandable search for blame. It’s clear that fires are getting worse. But why? Scientists point to a number of reasons. Hotter and drier conditions brought on by climate change can prime vegetation to burn, and decades of fire suppression have allowed fuel to accumulate in forests. Millions of people now live closer to those dry forests than ever. And then there is the matter of the beetles.
There are 600 species of bark beetles in the United States, and they’ve evolved with their various host trees over millennia. Many bark beetles infest already dead or dying trees, but some, like the mountain pine beetle, attack living ones. The mountain pine beetle alone has killed roughly 100,000 square miles of trees across western North America over the past 20 years, from New Mexico all the way up to northern British Columbia. Climate change has instigated this dramatic spread, by eliminating the cold spells that kill off the beetles and by leaving the trees stressed by drought, unable to defend themselves.

How much are beetles to blame for 2020 fires?
It’s not just hot, dry conditions and fire suppression that has exacerbated 2020's western fires. There’s also the attack of the beetles to consider.
The photos and news from the past month’s devastating fires across parts of the West—charred towns, dramatic helicopter rescues, apocalyptic skies—have provoked fear, anger, and an understandable search for blame. It’s clear that fires are getting worse. But why? Scientists point to a number of reasons. Hotter and drier conditions brought on by climate change can prime vegetation to burn, and decades of fire suppression have allowed fuel to accumulate in forests. Millions of people now live closer to those dry forests than ever. And then there is the matter of the beetles.
There are 600 species of bark beetles in the United States, and they’ve evolved with their various host trees over millennia. Many bark beetles infest already dead or dying trees, but some, like the mountain pine beetle, attack living ones. The mountain pine beetle alone has killed roughly 100,000 square miles of trees across western North America over the past 20 years, from New Mexico all the way up to northern British Columbia. Climate change has instigated this dramatic spread, by eliminating the cold spells that kill off the beetles and by leaving the trees stressed by drought, unable to defend themselves.