The Infectious risk has shown a gradual increase over the last 12 weeks, ending the period at its highest level..
Allergy risk activity has remained stable over the past 12 weeks in Clark, South Dakota.
No Pollution activity has been reported over the past 12 weeks in Clark, South Dakota.
Weather risk activity has been trending downward over the past 12 weeks in Clark, South Dakota.
Last updated: August 24, 2026
Data refreshed weekly