TUCSON, Ariz. (AP) — The El Tour De Tucson cycling event has been postponed from November to April. The Fourth Avenue Winter Street Fair, an open-air retail extravaganza, was canceled. The Tucson Festival of Books will be held virtually next March. And the Tucson Gem, Mineral & Fossil Showcase's producers are reviewing health safety guidelines to see whether a scaled-back version of their high-profile event can be staged as scheduled for two weeks starting Jan. 30

All told, fallout from the coronavirus pandemic has dealt a punishing blow to Tucson where dozens of winter and spring events norma...