August storms come over Carmel Hamlet fast, filling the small streams that run down toward the Croton reservoirs, and by the next morning the lawns have gained an inch overnight. GreenKeepers Lawn Care LLC works that surge — weekly mowing that stays ahead of the rain, trimming, edging, and cleanups at both ends of the season. Grass in this watershed country gets more water than it knows what to do with in a wet week and none at all in a dry one. Reading that, and cutting accordingly, is most of the craft. What a yard should look like afterward is simple: even, tidy at the borders, ready for whatever the sky does next.