I have worked in the Tucson area over the years once staying 6 months in a resort hotel in the Oro valley. One thing to be careful of is the washes during the summer monsoons. The only time I ever saw it rain harder was in New Orleans.
The water in the desert runs rapidly like off a table top and most years a few people underestimate the danger in these dried up little ditches. We were trapped for 3 days once when all the roads to the resort were washed out and 3 or 4 people lost their lives when caught in the flash floods.
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