As of January 2015, parts of zip code 76049 are designated as a flood zone by the Federal Emergency and Management Agency due to increased risk of flooding. These areas have a 1 percent increased risk of flooding annually and a 26 percent chance of flooding over 30 years.
The only areas of zip code 76049 designated as flood zones are the areas surrounding Fall Creek and Lake Granbury. As of 2015, Fall Creek has been given a Zone A designation, meaning that detailed analysis has not been performed for the area and the cause for flooding is unknown. The area surrounding Lake Granbury has been designated Zone AE, meaning that the floodway is a channel of a stream and annual flooding can be caused without a substantial increase in flood heights.