Grills include a rear gap to exhaust the fresh combustion air taken in from the front. Hot air forced back into the grill by a strong wind, however, will cause overheating that can harm the wiring and potentially cause a grease fire on your drip tray. To make sure this doesn’t happen to your built-in grill, build a backsplash taller than the rear vent of your pit. For grills on a cart, simply turn the back of the grill away from the wind.