Cyclone Ilsa has intensified off the Western Australian coast and is now classed as a category-five system. How did this happen?
Tropical Cyclone Structure National Oceanic and Atmospheric Administration
Cyclone Ilsa: Residents flee as intensifying cyclone approaches northwest Australia
Karratha Community Cyclone Preparation Help
Severe Tropical Cyclone Ilsa
Category 4 Cyclone Ilsa lashes northwest Australian coast
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Cyclone Ilsa just broke an Australian wind speed record. An expert explains why the science behind this is so complex
Cyclone Ilsa - Wikipedia