Dan Dotson's Brain Aneurysm -- 'Storage Wars' Auctioneer Has Slight C

"Storage Wars" auctioneer Dan Dotson was rushed to a hospital in Palm Springs Monday afternoon after suffering a double brain aneurysm ... and doctors said he only had a slight chance of survival.

Dotson's wife Laura Dotson tells TMZ ... Dan woke Monday morning around 1 AM asking weird questions in his sleep -- and when he got up again around 7:30 AM things took a turn for the worse.

Laura says Dan complained about having double vision and not feeling right -- so he went back to sleep. Dan got up a few hours later to take a shower, got out, and collapsed.

Laura says he turned blue, so she worked with an 911 operator to administer CPR.

Laura says Dan actually suffered two aneurysms -- one behind the eye and another in his neck the size of an apricot. He was given a 4%-20% chance of survival.

Luckily his surgery Tuesday afternoon was a success ... we're told he's doing better than expected but he's by no means out of the woods.