The disaster information lists multiple types of environmental disaster including:
Drought: prolonged or abnormally dry weather or lack of rain, especially that which affects the growth of crops or deplete reserves of water for industrial or domestic use. A drought poses a risk of serious environmental damage through vegetation loss and soil erosion, and a significant threat to the agricultural sector.
Heatwave: according to the Bureau of Meteorology, a heatwave is defined by three or more days of unusually high maximum and minimum temperatures in any area. There are three categories: Areas of Heatwave can expect unusually hot conditions sustained for three days. The level of heat is unusual, but injury to people is not expected unless inappropriate activities are conducted or sensible precautions are not followed. In a Severe Heatwave, vulnerable people are at risk of injury. Areas of Extreme Heatwave are likely to impact area such as infrastructure, transport, energy, agriculture and both healthy and vulnerable people are at risk of injury.
Image: Wetlands in the Coorong National Park, Mundoo (flickr)