All three governors are quoted in a news release out of Inslee's office, with Oregon Gov. Kate Brown and California Gov. Gavin Newsom expressing concern about overwhelming hospital systems and stressing the risk of travel during the ongoing surge in virus cases.
A statewide travel advisory was implemented Friday along with OR and Washington, asking residents to refrain from any non-essential travel. The Golden State is now averaging about 6,300 new cases a day over the past week, up from about 3,200 a month ago, according to a Times analysis.
The number of COVID-19 cases reported daily more than doubled in 13 states over the past two weeks, a lot of them in the Midwest, led by Iowa, Minnesota, Michigan and IL, according to a Reuters tally of figures from USA public health agencies.
While Disneyland Resort isn't projected to fully reopen until January 2021 at the earliest, California is preparing for the eventual uptick in travel to the state as people across the country resume travel.
"If you do not need to travel, you shouldn't", Brown said in a statement, noting that travel across California, Oregon and Washington could propagate an even worse spread of the virus.
"The advisories define essential travel as travel for work and study, critical infrastructure support, economic services and supply chains, health, immediate medical care and safety and security".
"Limiting and reducing travel is one way to reduce further spread of the disease".
That brings the total number of diagnoses in Washington to 123,356, including 2,507 deaths, according to the state Department of Health.
This comes as part of a partnership with OR and California, which also issued similar travel advisories Friday. "The actions we take today, tomorrow and next week have tremendous impact on the health and well-being of many, many people across the county", Ferrer said at a media briefing this week.
Andrew Noymer, a public health professor at the University of California, Irvine, said the voluntary element makes sense because the state can't police whether people follow quarantine rules.
Those three states require travelers to quarantine for 14 days and submit forms disclosing personal information if they arrive from states averaging 10 or more new daily cases of the coronavirus per 100,000 residents over a seven-day period, or from states where 10% or more of tests came up positive on average over the past week.
The incidence of COVID-19 is increasing in many states and countries.
"Within a month after Thanksgiving, the number of cases is going to be up significantly", Swartzberg said.