An Excessive Heat Warning is in effect from 6/25/2015 9:00 AM to 6/27/2015 9:00 PM PDT for Mohave County. Learn more about how to stay safe in extreme heat and stay informed about future heat alerts.

Rocky Mountain Spotted Fever (RMSF)


Rocky Mountain Spotted Fever (RMSF) is the most severe disease caused by a tick in the United States. RMSF is a sickness caused by the bite of a tick that has the disease. A majority of RMSF cases in Arizona happen in communities with large number of roaming dogs and a lot of ticks. The first case of RMSF was in 1896 in Snake River Valley, Idaho; however, Arizona has the most cases of RMSF in the U.S.