(Michael Currie/AAP PHOTOS)Fire-bombing aircraft are trying to help bring a number of blazes under control across Victoria. (Michael Currie/AAP PHOTOS) Credit: AAPAuthorities are warning that dry conditions could cause a large bushfire that ravaged communities within a national park to "run again" over the coming weeks. The threat has been downgraded for now after a blaze in Victoria's Otways destroyed three homes and 16 other structures when a wind change occurred during severe heatwave conditions. Mr Holland says crews continue to work around the region identifying areas where control lines can be put in during favourable weather conditions. Coastal areas of the state are expected to experience cooler conditions on Thursday, with temperatures hovering in the low 20Cs.