(Longview, WA) -- A firefighter is hospitalized following a three-alarm brush fire that forced evacuations and left dozens of people without power in southwestern Washington. Cowlitz County Fire District says one firefighter was hospitalized for heat-related illness while battling the blaze that scorched six acres yesterday near Longview. Deputies evacuated dozens of residents, and 40 people were left without power. An investigation is ongoing into what sparked the blaze.