Often Emergency Managers rely on bottled water and MOUs for water contingencies in their emergency plans. The effectiveness of these solutions requires not only on the availability of resources and suppliers, but an un-compromised transportation infrastructure to deliver the goods. After floods, earthquakes, tornados or most any natural disaster, roads may be impassable and prevent the flow of support to your location.
First Water advocates using in place water purification equipment as an additional resource in your response plan. While MOUs will still be valuable, it is important for you to have the ability to respond without outside resources if necessary. You ability to purify water on-site is a great first step in this plan.
The article below from Emergency Management magazine discusses the impact of transportation infrastructures that are damaged after a natural disaster.