When you replace a toilet, install a low-consumption model or a water saver. Standard toilets use 5 to 7 gallons per flush; "water-savers" use 3 to 4 gallons per flush; and new low-consumption models use 1.6 gallons, or less per flush. Until you replace your toilet, put a plastic bottle filled with water in the tank to cut down on water needed for a flush.
A fuel tank can tip over or float in a flood, causing fuel to spill or catch fire. Cleaning up a house that has been inundated with flood waters containing fuel oil can be extremely difficult and costly.
Fuel tanks should be securely anchored to the floor. Make sure vents and fill line openings are above projected flood levels.
Propane tanks are the property of the propane company. You will need written permission to anchor them. Ask whether the company can do it first.
Make sure all work conforms to state and local building codes.