Foiliar Disease Any Ideas?

[westocast73]

Ok well its been wet and cold here this past week. I didnt check my tomatoes yesterday but this morning I was out there and found two of my plants looking like the picture below. I removed every leaf that had this symptom and every leaf that had any edges on it that had the slightest hint of yellowing. It pretty much means I lost 1/3 the leaves on the two plants and ended up with a 4 liter ice cream bucket full of leaves which was promptly bagged and trashed. Now my question is would that be what you would try or does this look like something worse and the two plants should be yanked? The plants are a Nepal and a Lemon Boy. The fruits on both look perfect and the symptoms are starting on top growth with the bottom 1/3 of the plant completely disease free. This leads me to believe it is a fungus that has come in the recent rains we have had which makes me think my current course of action will do. My only fear though is that this happened in 48 hours and if its something worse it might spread to my other Tomatoes and doom my whole crop. So basically Should I be giving it a day or two to see if any new Fungus develops on the plants or should I yank them? ( The Two plants are beside each other )