Now there is another threat: a non-native Gypsy moth.
"This imminent danger of attacks poses a serious danger to the agricultural and horticultural industries of the state of Washington and threatens serious economic well-being and quality of life for citizens," the proclamation states.
The threat is made up of both Asian gypsy mats and Asian-European hybrid gypsy moths, according to the proclamation.
According to a government agency, the pests can cause major damage.
Females can lay hundreds of eggs, according to the agency, which become larvae and crunch through more than 500 different species of wood and bush.
And because the mills can fly long distances, they are likely to spread quickly across the country, the agency said.