Editing Heat wave (section)

=== Reduced economic outputs ===
[[File:09 Aus heatwave map.PNG|thumb|right|2009 southeastern Australia heat wave, thermal map approximate affected area shown in red]]
Calculations from 2022 suggest that heat waves will shrink the global economy by about 1 percent decrease by the middle of the 21st century.<ref>{{Cite web |last=Benedek |first=Réfi |date=2022-07-12 |title=The cost of heatwaves |url=https://hypeandhyper.com/en/the-cost-of-heatwaves/ |access-date=2022-07-15 |publisher=HYPEANDHYPER }}</ref><ref>{{Cite magazine |title=Rising Heat is Making it Harder to Work in the U.S. — the Costs for the Economy Will Soar with Climate Change |url=https://time.com/6093845/how-heat-hurts-the-economy/ |magazine=Time |access-date=2022-07-15}}</ref><ref name=":4"/>

Heat waves often have complex effects on economies. They reduce labour productivity, disrupt agricultural and industrial processes and damage infrastructure that is not suitable for extreme heat.<ref name=":3" /><ref name=":4" /> In 2016, a marine heatwave in Chile and its subsequent [[harmful algal bloom]] caused $800 million (USD) in export losses for the aquaculture industry as salmon and shellfish died off.<ref>{{Cite journal |last1=Trainer |first1=Vera L. |last2=Moore |first2=Stephanie K. |last3=Hallegraeff |first3=Gustaaf |last4=Kudela |first4=Raphael M. |last5=Clement |first5=Alejandro |last6=Mardones |first6=Jorge I. |last7=Cochlan |first7=William P. |date=2020-01-01 |title=Pelagic harmful algal blooms and climate change: Lessons from nature's experiments with extremes |journal=Harmful Algae |series=Climate change and harmful algal blooms |volume=91 |pages=101591 |doi=10.1016/j.hal.2019.03.009 |issn=1568-9883|doi-access=free |pmid=32057339 |bibcode=2020HAlga..9101591T }}</ref>