Water damage/need to evict

[Seattle Eltons]

First of all let me say, a lot of this is my fault for allowing them to stay this long. Due to backed up sewer and lots of rain, water damaged the unit and they didn't tell me for days. Now there's mold everywhere and I need to get the water repairi crew in there and the tenants claim they can't come in unless they're there (like they're going to take their stuff). Due to liability, the water repair company won't work with them in there because of liability. Initially I thought the tenants were going to work with me on this because they felt bad about being behind on rent. I told them it was going to take a while to fix it all, and they couldn't do it with them in there because it's small and they have stuff piled everywhere. So they told me on Friday that they won't let anyone in there without them being there. I've contacted a lawyer but the lawyer's out of the office right now (the weekend). I've never had any issue with tenants up to this point, so I'm new to this process (renting out property for about 9 years). 

Not sure if this is an issue, but their agreement expired and I didn't actually renew it with anything. Sometimes I'm late with that stuff but it never seemed like a big issue before (yeah this is my fault I know). 

So I want to serve them an eviction today, but it might take forever to get them out and in the meantime mold will be spreading to the other units (this is a small basement unit in a converted triplex). There are children in one of the other units so I'm quite concerned about not starting the work immediately.

What I want is for them to be completely gone and all their stuff out so that the water repair can begin and I can move forward to getting a new renter in there. Are there any thoughts? I'm super stressed and feeling a bit desperate right now.