Many dead fish have accumulated in a river close to a town in Australia.

Thousands of dead fish have washed up in a river near a small Australian town, in a phenomenon state officials say is related to the "heatwave conditions" that are sweeping the country. Video emerged this week showing masses of dead fish floating at the Menindee Weir pool near Broken Hill, CNN affiliate 9News Australia reported. The Department of Primary Industries (DPI) in New South Wales explained that the fish deaths are related to low oxygen levels in the water (hypoxia) as flood waters recede.Dead fish sightings were also reported this week in the Macquarie Valley, where there are both suburbs and a national park. This wasn't the first time Menindee residents have witnessed mass fish deaths, as thousands of dead fish were reported in the area in February and a similar event occurred in the region in 2019.Experts and government agencies have warned that Australia will continue to see spikes in extreme rainfall and heat, as well as more dangerous fires.