If your grill doesn’t have a cover, shape two sheets of heavy-duty aluminum foil into a dome shape the same size as the grill rack. You can form the foil over bent coat hangers to keep the shape and to reuse. If you like, fashion a handle out of the hangers, and poke it through the foil at the top of the dome.
From "Betty Crocker's Complete Cookbook, Everything You Need to Know to Cook Today, 9th Edition." Text Copyright 2000 General Mills, Inc. Used with permission of the publisher, Wiley Publishing, Inc. All Rights Reserved.