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“... , while Ngarkat Conservation Park, in the state's upper-southeast,

is also a blaze. (Paragraph 3) 
What do the underlined words mean?
on fire
Discussion:
At Robertstown in the state's mid-north, more than 2,500 acres .have already burned. Another bushfire, started by lightning, charred the earth near Mouth Flat on the southern side of Kangoroo Island, while Ngarkat Conservation Park, in the state's upper southeast, is also a blaze.

A 7,500-acres fire at Mount Agnew in Zeehan, in the state's west, broke containment lines Saturday afternoon, jumping a road and coming close to 
homes.

The most serious fires were in Victoria, where up to six homes were destroyed by a fire near the town of Anakie, 36 miles west of Melbourne.