Why do wildfires occur in Australia?

Because of Australia’s geographical and climate characteristics, it is easy to trigger wildfires. Although it is surrounded by the sea, the inland is far away from the ocean and is extremely short of water. There are no large rivers and lakes. The main tree species in Australia is eucalyptus, accounting for 70% of the forest area. The bark and leaves of trees are rich in oil, and they gather on the ground after falling off. When encountering high temperatures above 40°C, they are very easy to spontaneously combust;

The most serious wildfire in Australia's history affects more than just itself. Thick smoke from the wildfires has crossed the Tasman Sea and affected New Zealand. On the last day of 2019, smoke from forest fires in the Australian states of Victoria and New South Wales drifted eastward, causing orange smoke to appear in much of New Zealand's South Island.

More than 10 million hectares of land, an area equivalent to the size of Austria, have been destroyed by fires. The fire has killed 24 people and killed nearly 500 million animals (birds, mammals, reptiles); 1,500 houses were destroyed, and thousands of people were forced to flee and become homeless.