A severe thunderstorm warning was issued by the National Weather Service in Tucson at 1:53 p.m. on Thursday, July 3. This warning applies to Pima County and runs through 4:30 p.m. ...

The tipping point for alarm: 200 cases per 100,000. The county is already reaching a negative marker with its positivity rate, which ideally should be below 10% but this week was as high as 16%.