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.
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A weather warning is also in place for Scotland, which could see "treacherous" and blizzard-like conditions on Thursday.
The lorry lost several butane gas canisters as the driver rammed into cars in a dangerous escape attempt that was ended by police gunfire.
The Gambling Commission said: "Integrity in sport is not a joke and we have opened an investigation to establish exactly what happened."