Williamson County enters red phase as delta variant spreads By FOX 7 Austin Digital Team Published WILLIAMSON COUNTY, Texas - Williamson County announced today that it has met the criteria to increase to its "Red Phase," one week after moving to "Orange." The criteria set by the Williamson County and Cities Health District (WCCHD) for "Red Phase" was reached on July 17. The color-based Phase Guidelines are not changes to local rules or regulations for businesses; they are guidelines for individual actions and behaviors based on levels of risk of exposure in the community, according to a press release from the county. It also noted that everyone should continue to follow any additional requirements of local businesses, venues, and schools regardless of vaccination status or stage.