If power isn't shut off to a flooded furnace system, shut the main switch off at the meter or remove the fuse to the furnace. Clean mud and debris from electric baseboard heating fixtures, being careful not to damage heating equipment. Have a professional handle cleaning and reconditioning of all working parts. Be sure you check your chimney for dirt, debris and leaks before lighting the furnace or a fire. If flood damage has occurred, have a mason do an inspection and make repairs.
Most chimneys have a foundation in the ground.
If the chimney looks like it has settled or tilted, examine the footing to see whether it has been undermined. Have the chimney rebuilt if it has settled badly or is broken where it passes through floors or roof. If mortar in the joints between bricks has disintegrated, have a mason rejoint the chimney with cement.