Use a good base of dry kindling and make a small fire first. Cover it with a blanket of leaves or a sheet of bark so rain can’t soak it. Build a windbreak with rocks or a log pile to keep the wind off. Keep a supply of tinder—dry bark, pine needles, or even a paper cube—on hand. If the rain starts, tuck the embers under a rock or a sturdy log and keep adding small pieces of dry wood. Keep the fire small at first, then let it grow once the rain eases. That’s all you need.