(Lakeview, OR) -- Crews continue to make progress against the Bootleg Fire in Southern Oregon. Fire officials say the blaze is now 38-percent contained as of late last night. That's up from 30-percent containment on Tuesday. Officials say cooler temperatures and calmer winds helped firefighters increase their containment of the blaze yesterday. However, temperatures are expected to warm back up this weekend, and Forestry officials warn the fire may burn another 100-thousand acres before crews can completely put it out. The fire has now scorched over 395-thousand acres and remains the largest wildfire currently burning in the U.S.