The goal since the pandemic started last March has been to keep hospitals from reaching capacity, but weâre past that now: Pima Countyâs hospitals are full and COVID-19 case counts keep reaching record highs. âWeâve been talking about when the time would come when we are overwhelmed,â said Dr. Shannon Thorn, a Tucson infectious-disease specialist, âand we have reached that time.â Thorn, who provides help at several local hospitals, said the number of available staffed hospital beds fluctuates depending on patients being discharged, transferred or dying. On Wednesday night, one ICU bed became open. It filled immediately.