How can I safely extinguish a grease fire involving flour?

To safely extinguish a grease fire involving flour, do not use water as it can cause the fire to spread. Instead, cover the fire with a metal lid or baking sheet to smother it. Turn off the heat source and leave the lid in place until the fire is completely out. Do not attempt to move the pan or throw anything on the fire. If the fire is too large to control, evacuate the area and call emergency services.