The Blight can do a job on your tomatoes. I used to spray them in hopes of avoiding it, but I think that anyone going to be hit with it, it may be too late. I understand it is spread through spores flying through the air, hopefully we don't get any breezes from Jericho. They talked with Dean Brigante down at Mallets Bay last night and he said, so far he is fine:
If you would like to see some photos, click on the following link:
http://www.longislandhort.cornell.edu/vegpath/photos/lateblight_tomato.htm#imagesIf you go to the top of this page there is also much more information