The Coronavirus FAQ for Rick Steves Tour Members webpage has been updated to announce cancellation of tours to Spain beginning through March 27. And now, effective March 13, all tours with starting dates through April 19 have been canceled. See link at beginning of this paragraph.
I've also started a thread in the General Europe forum because there's a new reference on that page to reviewing other tours for March and April. In addition, clients scheduled for tours beginning through May 2020 who are concerned about traveling have the option of rescheduling for later this year or obtaining a credit to be applied to a 2021 tour.