Here's a great resource for tracking the fires.
First up, maps. I think this is the best one:
There's also this one:
It uses satellites to pinpoint where the hot spots on the ground are. It's good for getting a general idea of where there fires are, but it's not 100% accurate and it won't be able to tell you if the fire is on one side of the road vs the other, if you're trying to find out if a specific house is on fire. (Trust me, I tried...)
Second, for those of you living in Clackamas County, here are the evacuation notices. SUPER important to check this often because it changes.
Here's one for Washington County:
Additionally, follow these people on Twitter
Clackamas County Sheriff: @ClackCoSheriff
Clackamas Fire District: @clackamasfire
Tualatin Valley Fire and Rescue: @TVFR
Red Cross Cascades: @RedCrossCasc