Many people don't have the luxury of being close to a good source of water such as a lake, stream or river. Water is a necessity for many purposes...cooking, cleaning and maintaining proper hygiene. Even if you have a good water source you will need the proper means to filter and purify your water.
Many types of food items require a certain amount of water to process them. Powdered milk, dry bulk food items such as rice or pasta are just a few. Dehydrated food items also need water in order to successfully make a meal. Many can foods have additional water in them but can still require additional water for cooking.
You will also need water for drinking and hygiene purposes. At a minimum of one gallon per day, you're talking about a large amount of water for just a 72 hour period.
Making sure you have adequate supplies of water during an emergency should be a priority.
Be aware. Be informed. Be prepared.