The Colusa Fire Department quickly attacked a blaze at Colusa County Health and Human Resources around 12:20 PM on Tuesday. The fire, which is under investigation, appeared to come from the roof solar installation at the HHR new portable building, officials said. International data suggests that fires caused by rooftop solar power systems are rare, typically from improper installation, but fumes from solar fires can contain toxic chemicals that can be hazardous if inhaled.