"Yes. Sounds like you've got the late blight that has been going around this year.
To get rid of the blight and make sure it doesn't infect your soil and recur in the future, you need to pull and destroy all vines that show evidence of the blight. Don't compost the sick vines. That will just produce infected compost. Sorry. But you're not alone in having this in this summer's cool, damp conditions."