The Infectious risk has shown a gradual increase over the last 12 weeks, with the most recent week notably higher than earlier in the window..
Allergy risk activity has been easing over the past 12 weeks in Morrow, Oregon.
Pollution risk activity has been increasing over the past 12 weeks in Morrow, Oregon.
Weather risk activity has been trending upward over the past 12 weeks in Morrow, Oregon.
Last updated: August 24, 2026
Data refreshed weekly