Other / Not Specified, Other Business Eureka, CA – Sprinkler system extinguishes early morning arson fire at Wharfinger Building February 23, 2015 viking210 Humboldt Bay Fire responded to multiple arson fires in the early morning hours of today and Wednesday. There were a total of six fires reported to fire officials. The most significant fire was at the city of Eureka Wharfinger Building. The fire was large enough to activate the sprinkler system which extinguished the fire. Humboldt Bay Fire was notified via the activation of the sprinkler alarm system. Damage to the facility was minimal as the sprinkler system functioned properly and prevented the fire from spreading to the structure.