Temperatures in Melbourne are so hot that an egg has been pictured frying on court at the Australian Open tennis tournament.
Australian breakfast TV show Sunrise tweeted this photograph:
Forecasters suggested temperatures could hit 44C on Thursday and Friday.
More top news
The chief medical officer for England told ITV News that misuse of antibiotics must be curbed, and new ones must be developed.
Climate change is a pressing issue for Tonga, but has it had the attention it deserves at the Commonwealth summit?
With temperatures peaking at 29C today, it is the hottest April day for nearly 70 years.