Hemlocks, red cedars, and big leaf maples are all dying in Washington State. Scientists believe the cause is climate change. Washington state has experienced an unprecedented drought in the past several years. The drought and heat conditions is causing stress on all trees, even trees deep in the forest. Forest entomologists fly over the state looking for the brown dying foliage. The areas dying off are large enough to be seen from the sky. Nearly 500,000 acres of Washington forest has damage. Trees that survived for centuries are being affected.