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Lamar County Multi- Jurisdictional Hazard Mitigation Plan <br />Chapter Three <br />Figure 4: Texas Climatic Regions <br />Chart 4: North Central Texas Drought Years & Percentage of Normal* Rainfall <br />1925 1943 1944 1954 1955 1963 1999 2005 <br />* Normal Rainfall amount are based on 1931 -1960 average precipitation for the North Central Texas Region. <br />5. Probability of Future Events <br />Given that 12 severe drought events have occurred in the North Central Texas Region over the past <br />100 years one may conclude that Texas can expect a severe drought every decade. However, long- <br />term forecasts of droughts are difficult and inexact. The U.S. Corp of Engineers (USAGE) is <br />preparing the National Drought Atlas to provide information on the magnitude and frequency of <br />minimum precipitation and stream flow for the contiguous United States. NOAA states that at any <br />given time 20% of the nation is a drought. For the purpose of this plan drought events are likely. <br />6. Vulnerability <br />The cause of all droughts is the shortage of rainfall. During a drought, the earth is so dry that even if <br />a rainfall occurs it evaporates quickly. The cause for this hazard in the Lamar County area often is a <br />­0 Crew 7­ <br />Chart 4: North Central Texas Drought Years & Percentage of Normal* Rainfall <br />1925 1943 1944 1954 1955 1963 1999 2005 <br />* Normal Rainfall amount are based on 1931 -1960 average precipitation for the North Central Texas Region. <br />5. Probability of Future Events <br />Given that 12 severe drought events have occurred in the North Central Texas Region over the past <br />100 years one may conclude that Texas can expect a severe drought every decade. However, long- <br />term forecasts of droughts are difficult and inexact. The U.S. Corp of Engineers (USAGE) is <br />preparing the National Drought Atlas to provide information on the magnitude and frequency of <br />minimum precipitation and stream flow for the contiguous United States. NOAA states that at any <br />given time 20% of the nation is a drought. For the purpose of this plan drought events are likely. <br />6. Vulnerability <br />The cause of all droughts is the shortage of rainfall. During a drought, the earth is so dry that even if <br />a rainfall occurs it evaporates quickly. The cause for this hazard in the Lamar County area often is a <br />