Currently, Ohio has seven counties that have triggered a Red Level 3 Public Health Emergency Alert:

Butler
Cuyahoga
Franklin
Hamilton
Huron
Montgomery
Trumbull

I spoke to the health commissioners in each of the seven red counties. I asked them why we were seeing the spread. Here's what they told me:

Large family gatherings like birthday parties, graduations, funerals. In one county, the same last names are coming up as positive again & again, indicating family spread.

The workplace, at tourist destinations, and in churches. One health commissioner told me about a pastor and his wife who were both #COVID19 positive and it spread from there.

In Huron County, which is currently at a red-alert level, their health commissioner told me that while they have a large outbreak among migrant agricultural workers, 7 out of 10 cases there are among non-Hispanic people.