An electrical equipment rack, such as a computer server rack, with a protective shield to protect the electrical equipment rack and equipment thereon from water damage is described. In general, the shield is constructed of a curved polycarbonate shell fastened to an aluminum frame having arc-shaped end sections attached to spaced elongated side rails. The aluminum frame is attachable to threaded rod hangers of the type that are used in most server rack rooms. Multiple shields may be fastened together end-to-end to increase the length of the overall shield, to extend over the entire length of the server racks or cabinets needed to be protected. Gaskets such as neoprene seals are compressed between shield sections to prevent water from penetrating between the fastened sections. Deployable curtains are fastened to the elongated side rails to further protect the electrical equipment rack from water damage.