( CNN ) -- Firefighters in Nevada have fully contained a wildfire that engulfed dozens of homes and burned nearly 2,000 acres , an incident commander said Monday . The Caughlin Fire in Reno burned 1,935 acres before firefighters contained the blaze , said Sierra Fire Protection District Chief Mike Brown , the incident commander . The blaze has made 32 homes uninhabitable and damaged five , but is no longer a major threat to other structures , Reno Fire Chief Michael Hernandez said Sunday . The cause of the fire remains unknown , but Hernandez said his department has ruled out that the blaze started at a homeless encampment or that teenagers seen in the area were responsible . Investigators believe -- though have not confirmed -- that high winds caused electrical arcing on a power line , which sparked the fire , Hernandez said . The city of Reno , the rest of Washoe County and Nevada all declared states of emergency Friday . The fire was reported shortly after midnight Thursday , spreading within an hour and becoming a three-alarm blaze , Hernandez said . The blaze ballooned within about 12 hours , destroying some structures and causing minimal damage to others , according to the fire chief . He estimated that firefighters had saved 4,000 to 4,500 homes by Friday . CNN 's Shawn Nottingham contributed to this report .
The Caughlin Fire is estimated at 1,935 acres , a fire chief said . Many homes are made uninhabitable by the blaze . Scientists are working to determine what cause the fire .