On July 19th, 1974 a severe thunderstorm and heavy rains caused flash flooding and extensive damage in Lake Havasu City.  National Storm Summary Friday, a severe storm struck Grand Junction, Colorado with 72 mph winds causing damage to aircraft, trailers and power lines. The storm soaked Grand Junction, Colorado with 1.30 inches of rain in less than an hour. Late Friday night extensive flooding occurred between Needles, California and Lake Havasu City, Arizona , where power and phone lines were downed. Three persons drowned as a result of the floods. National Flood Summary July 22, 1974 "Considerable flooding occurred during the weekend in western Arizona and some nearby areas in California and Nevada. Some of the areas affected included Lake Havasu, Arizona; where three lives were reported lost by drowning; and Bullhead City and Kingman. Several roads and highways were closed by high water." - Both above from the July 23, 1974 Edition of the Weekly Weather and Crop Bulletin,...