The autumn extreme rains in Queensland caused a remarkable transformation in the Australian inland: Lake Eyre, a vast salt flat located in the country’s most arid region, partially filled up again, something that had not happened in years.
This endorheic system —which receives water from approximately one-sixth of the continent— usually remains dry, as the water evaporates before reaching it. However, in 2025, rivers overflowing due to exceptional rains began pouring their waters into the lake bed since late March.
An oasis revived by extreme rains in the middle of the desert
By early May, the water reached Lake Eyre and continued to expand.
Satellite images from the MODIS instrument of NASA’s Terra satellite, captured between April 29 and June 12, show the evolution of the phenomenon: the water entering from the north, spreading to cover the deepest areas such as the Gulf of Madigan and Belt Bay, about 120 km to the south.
These sectors, located over 15 meters below sea level, are the lowest points in Australia.
The last time it completely filled up was in 1974
Although it is not expected for the lake to completely fill up, as it did in 1974, when it reached a record depth of 6 meters, experts and rangers ensure that the current event is one of the most significant in decades.
For Eyre to fill up completely, two consecutive years of exceptional rainfall would be necessary, due to its massive catchment area and the high evaporation rates typical of the desert environment.
Wildlife explosion: shrimps, fish, and millions of birds
Beyond the level reached, the water influx has already caused a true biological explosion:
- Artemia eggs that were dormant in the dry bed hatched.
- Shield shrimps, freshwater crabs, and migratory fish emerge.
- Millions of migratory water birds —such as pelicans and stilts— arrive at the site from China, Japan, and other remote regions.
This natural spectacle transforms Lake Eyre into an ephemeral oasis that attracts both scientists and photographers, birdwatchers, and local visitors.
An unusual phenomenon revealing the resilience of the Australian ecosystem
The current event highlights the regenerative capacity of the most extreme ecosystems on the planet and opens up new opportunities for research on hydrological phenomena, adaptive biodiversity, and the effects of climate change in arid areas.
Cover photo: NASA Earth Observatory/Wanmei Liang
