The Infectious risk has remained broadly stable over the last 12 weeks, with the most recent week close to the 12-week average..
Allergy risk activity has been trending downward over the past 12 weeks in Harris, Texas.
Pollution risk activity has been decreasing over the past 12 weeks in Harris, Texas.
Weather risk activity has been decreasing over the past 12 weeks in Harris, Texas.
Last updated: August 24, 2026
Data refreshed weekly