The world received yet another stark reminder of the increasing impacts of climate change last week.

Temperatures breached the 40 degrees Celsius (104 degrees Fahrenheit) mark for the first time ever in England, and set a record high in Scotland, home to one of the world's largest farmed salmon sectors.

While salmon farmers get understandably nervous when temperatures rise, last week's spike resulted in no reported mortalities, primarily because Europe's recent extremely high temperatures have not resulted in marine heat waves, which refers to prolonged periods of unusually high sea temperatures, Elisabeth Ytteborg, scientist at Norwegian food science research institute Nofima, told IntraFish.