The degree of flood protection required by this chapter is considered reasonable for regulatory purposes and is based on scientific and engineering considerations. Larger floods can and will occur on rare occasions. Flood heights may be increased by manmade or natural causes. This chapter does not imply that land outside the areas of special flood hazards or uses permitted within such areas of special flood hazards will be free from flooding or flood damages. This chapter shall not create liability on the part of Vernal City, any officer or employee thereof, or the Federal Emergency Management Agency for any flood damage that result from reliance on this chapter or any administrative decision lawfully made thereunder. (PZSC § 03-08-006 (6))