A nearby testing station has already reached capacity for this weekend, appointments vanishing within minutes. Hospitals are filling up. Restaurants are again shutting down, more than a month after Arizona reopened its economy under the mantra "Return Stronger."Arizona has emerged as an epicenter of the early summer's coronavirus crisis as the outbreak has metastasized, flaring across new parts of the country and, notably, infecting more young people.

Maricopa County, which includes Phoenix, is recording as many as 2,000 cases a day, "eclipsing the New York City boroughs even on their worst days," warned a Wednesday brief by disease trackers at Children's Hospital of Philadelphia, which observed, "Arizona has lost control of the epidemic."