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Lamar County Multi- Jurisdictional Hazard Mitigation Plan <br />Chapter Three <br />Chart 3: NOAA's Weather Service Heat Index <br />Category Heat Possible heat disorders for people in high risk groups <br />Index <br />130 °F or <br />Extreme higher Heat stroke or sunstroke likely <br />Danger (54°C or <br />higher) <br />105 - 129 °F Sunstroke.. muscle cramps. and /or heat exhaustion likely Heatstroke possible <br />Dan g er (41 - 54 °C) with prolonged exposure and/or physical activity. <br />Extreme 90 - 105 °F Sunstroke, muscle cramps, and /or heat exhaustion possible with prolonged <br />Caution (32 - 41 °C) exposure and /or physical activity <br />Caution 80 - 90CF Fatigue possible with prolonged exposure and/or physical activity. <br />(27 - 32-C) <br />4. PREVIOUS OCCURRENCES <br />In a normal year, approximately 175 Americans die from extreme heat. Between 1936 and 1975, <br />nearly 20,000 people succumbed to the effects of heat and solar radiation. From 1979 -1999, <br />excessive heat exposure caused 8,015 deaths in the United States. On average approximately 400 <br />people die each year from exposure to heat. In Texas, July is generally the hottest month of the <br />year, followed by August. <br />Lamar County and Texas are no strangers to hot temperatures and what may seem like a heat wave <br />in the northeastern United States is just an average summer for Lamar County. The 2006 North <br />American Heat Wave affected Lamar County but not as drastically as it did other parts of the <br />country. During this event there were reports from Dallas of rupture water lines and buckled <br />roads. <br />71 <br />