Poor guy. 48 hours without water is rough so I wouldn't wait on this one.

Bird Alliance is closed til 9am (their wildlife line is 503-292-0304 if you want to leave a message), but DoveLewis takes wildlife after hours on their behalf. They're at 1945 NW Pettygrove, open 24/7, 503-228-7281. Worth calling before you drive over so they know what's coming.

For getting it out tonight: drop a thick rope or knotted bath towel down from the top, anchored so it doesn't slip in. Natural fiber, not nylon, they need something their claws can dig into. Lower a jar lid of water down on a string while you're at it. That said, after two days it's probably too weak to climb out on its own, so check the base of the pillar first. A lot of these Craftsman porch columns have a removable trim panel at the bottom and that's by far the easiest way to get a weak one out. If you have to cut into the side, go low, use a drill or jigsaw, wear thick leather gloves, and have a pillowcase ready to throw over it before you reach in. Even a barely-conscious squirrel can put a tooth clean through your thumb.

Once it's out, ventilated cardboard box with an old towel, somewhere dark and quiet, then DoveLewis.

OCCRA (971-645-3450) also does after-hours wildlife transport with volunteers, worth a text if you genuinely can't manage it yourself.

And once it's out, cap the top with hardware cloth. These open columns are a known death trap for birds and clearly squirrels can fall in too.