Are worms an emergency?

My five month old kitten threw up this morning, and there were worms in it. My vet is closed due to a snow storm we had. Is this something that need to be treated today, or can I wait until tomorrow to get medication for him? It looked like roundworms.

Thanks

If the vet can see him tomorrow, I'd wait.  Otherwise, if you can take him today and it won't cost an arm and a leg, try that.  Just make sure to keep him away from any other cats for the duration.