Ocean heat waves are becoming more common and lasting longer
The extreme events can kill corals and kelp and throw marine ecosystems into chaos
![kelp forest](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2018/04/041018_CG_marine-heat_feat.jpg?fit=860%2C460&ssl=1)
SWELTERING STRANDS In 2011, a marine heat wave off Australia’s southern coast devastated the towering kelp forests of the Great Southern Reef (shown).
Emma Flukes