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- Tropical Storm Octave was considered the worst tropical cyclone in the history of Arizona, whose remnants caused devastating and record-breaking flooding in the state. The nineteenth tropical cyclone and fifteenth named storm of the 1983 Pacific hurricane season, the origins of Tropical Storm Octave were from a tropical disturbance that formed south of the Gulf of Tehuantepec on September 23, 1983. Steered by a deep layer high over Mexico, the disturbance moved west for four days before becoming a tropical depression on September 27 off the southwest coast of Mexico. Over an area of warm sea surface temperatures, it was able to quickly strengthen to peak winds of 50 mph (85 km/h), through wind shear prevented much further development. By September 30, Octave was accelerating to the northeast, steadily weakening due to cooler waters. That day it weakened to tropical depression status, and on October 2, Octave dissipated. In Arizona, the highest rainfall total was 12.0 in (300 mm) at Mount Graham. In Tucson, flood waters were reportedly 8 ft (2.4 m) high. Throughout the state, excessive rainfall caused many rivers to overflow. After the rain ended, the Santa Cruz, Rillito, and Gila rivers experienced their highest crests on record. Five towns – Clifton, Duncan, Winkelman, Hayden, and Marana – were almost completely flooded. In Marana, many homes were submerged, forcing residents to be evacuated. Over 700 homes were destroyed in Clifton. In addition, 86 of the town's 126 business were heavily damaged due to the flooding. Around 3,000 buildings were destroyed due to Octave. A total of 853 houses, mobile homes, and apartments were destroyed while 2,052 others were damaged. About 10,000 people were temporarily left homeless. Damage in Arizona totaled $500 million (1983 USD), which was above the preliminary estimate of $300 million. Fourteen people drowned and 975 persons were injured. Elsewhere, Octave was responsible for $12.5 million in damage in New Mexico. Following the storm, governor Bruce Babbitt declared a state of emergency. President Ronald Reagan declared Cochise, Gila, Graham, Greenlee, Pima, Pinal, Santa Cruz and Yavapai counties a "major disaster area". (en)
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- Tropical Storm Octave was considered the worst tropical cyclone in the history of Arizona, whose remnants caused devastating and record-breaking flooding in the state. The nineteenth tropical cyclone and fifteenth named storm of the 1983 Pacific hurricane season, the origins of Tropical Storm Octave were from a tropical disturbance that formed south of the Gulf of Tehuantepec on September 23, 1983. Steered by a deep layer high over Mexico, the disturbance moved west for four days before becoming a tropical depression on September 27 off the southwest coast of Mexico. Over an area of warm sea surface temperatures, it was able to quickly strengthen to peak winds of 50 mph (85 km/h), through wind shear prevented much further development. By September 30, Octave was accelerating to the northea (en)
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