News live: up to 18,000 homes evacuated so far in South Australia floods; emergency bushfire warning for Port Kennedy in WA

Water has been rising slowly and steadily – and sometimes quickly and unpredictably – for weeks in SA. Follow the day’s news live

A fourth child in the space of two days has been airlifted to hospital from K’gari (Fraser Island) with suspected Irukandji jellyfish stings.

The RACQ LifeFlight Rescue helicopter airlifted the young boy from the island after he was stung on the upper leg just after 2.30pm on Wednesday.