Utilize street trees, planters or rain gardens to effectively manage stormwater

Keep the front of your building shaded and protected. Take care of the street trees along your property line and on sidewalks near your building. Planters or rain gardens along your property line and in courtyards can help absorb some of the rainwater that collects on your property.
http://www.milliontreesnyc.org/html/planting/tree_planting_and_care.shtml