Complex sentence: On the 22nd of January, hot and dry conditions that had persisted for several days, worsened considerably, spreading the fire rapidly in a southerly direction towards Dunkeld, South of Grampians National Park.
Split into simpler sentences: On the 22nd of January, hot and dry conditions that had persisted for several days worsened. The fire spread rapidly in a southerly direction towards Dunkeld, South of Grampians National Park.