California Extreme heat deaths show climate change risks

Link:https://www.latimes.com/projects/california-extreme-heat-deaths-show-climate-change-risks/

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Excerpt:

Between 2010 and 2019, the hottest decade on record, California’s official data from death certificates attributed 599 deaths to heat exposure.

But a Times analysis found that the true toll is probably six times higher. An examination of mortality data from this period shows that thousands more people died on extremely hot days than would have been typical during milder weather. All told, the analysis estimates that extreme heat caused about 3,900 deaths.

….

California’s undercount is one of the ways it overlooks the threat posed by heat waves, even as climate change delivers them more frequently, more intensely and with deadlier consequences. Other states are moving with greater urgency to confront this public health challenge that disproportionately imperils the elderly and vulnerable.

Extreme heat did not suddenly become a threat to Californians’ lives. The Times found that state leaders have ignored years of warnings from within their own agencies that heat was becoming more dangerous. Data reviewed by The Times show heat-related hospital visits increasing in some parts of California, including Los Angeles County, for at least the last 15 years.

Github: https://github.com/datadesk/extreme-heat-excess-deaths-analysis

Author(s): Anna M. Phillips, Tony Barboza, Ruben Vives, Sean Greene

Publication Date: 7 Oct 2021

Publication Site: LA Times

Projections of temperature-related excess mortality under climate change scenarios

Link: https://www.thelancet.com/journals/lanplh/article/PIIS2542-5196(17)30156-0/fulltext

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Our dataset comprised 451 locations in 23 countries across nine regions of the world, including 85 879 895 deaths. Results indicate, on average, a net increase in temperature-related excess mortality under high-emission scenarios, although with important geographical differences. In temperate areas such as northern Europe, east Asia, and Australia, the less intense warming and large decrease in cold-related excess would induce a null or marginally negative net effect, with the net change in 2090–99 compared with 2010–19 ranging from −1·2% (empirical 95% CI −3·6 to 1·4) in Australia to −0·1% (−2·1 to 1·6) in east Asia under the highest emission scenario, although the decreasing trends would reverse during the course of the century. Conversely, warmer regions, such as the central and southern parts of America or Europe, and especially southeast Asia, would experience a sharp surge in heat-related impacts and extremely large net increases, with the net change at the end of the century ranging from 3·0% (−3·0 to 9·3) in Central America to 12·7% (−4·7 to 28·1) in southeast Asia under the highest emission scenario. Most of the health effects directly due to temperature increase could be avoided under scenarios involving mitigation strategies to limit emissions and further warming of the planet.

Author(s):

Antonio Gasparrini, PhD
Yuming Guo, PhD
Francesco Sera, MSc
Ana Maria Vicedo-Cabrera, PhD
Veronika Huber, PhD
Prof Shilu Tong, PhD
Micheline de Sousa Zanotti Stagliorio Coelho, PhD
Prof Paulo Hilario Nascimento Saldiva, PhD
Eric Lavigne, PhD
Patricia Matus Correa, MSc
Nicolas Valdes Ortega, MSc
Haidong Kan, PhD
Samuel Osorio, MSc
Jan Kyselý, PhD
Aleš Urban, PhD
Prof Jouni J K Jaakkola, PhD
Niilo R I Ryti, PhD
Mathilde Pascal, PhD
Prof Patrick G Goodman, PhD
Ariana Zeka, PhD
Paola Michelozzi, MSc
Matteo Scortichini, MSc
Prof Masahiro Hashizume, PhD
Prof Yasushi Honda, PhD
Prof Magali Hurtado-Diaz, PhD
Julio Cesar Cruz, MSc
Xerxes Seposo, PhD
Prof Ho Kim, PhD
Aurelio Tobias, PhD
Carmen Iñiguez, PhD
Prof Bertil Forsberg, PhD
Daniel Oudin Åström, PhD
Martina S Ragettli, PhD
Prof Yue Leon Guo, PhD
Chang-fu Wu, PhD
Antonella Zanobetti, PhD
Prof Joel Schwartz, PhD
Prof Michelle L Bell, PhD
Tran Ngoc Dang, PhD
Prof Dung Do Van, PhD
Clare Heaviside, PhD
Sotiris Vardoulakis, PhD
Shakoor Hajat, PhD
Prof Andy Haines, FMedSci
Prof Ben Armstrong, PhD

Publication Date: 1 December 2017

Publication Site: The Lancet

The burden of heat-related mortality attributable to recent human-induced climate change

Link: https://www.nature.com/articles/s41558-021-01058-x

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Climate change affects human health; however, there have been no large-scale, systematic efforts to quantify the heat-related human health impacts that have already occurred due to climate change. Here, we use empirical data from 732 locations in 43 countries to estimate the mortality burdens associated with the additional heat exposure that has resulted from recent human-induced warming, during the period 1991–2018. Across all study countries, we find that 37.0% (range 20.5–76.3%) of warm-season heat-related deaths can be attributed to anthropogenic climate change and that increased mortality is evident on every continent. Burdens varied geographically but were of the order of dozens to hundreds of deaths per year in many locations. Our findings support the urgent need for more ambitious mitigation and adaptation strategies to minimize the public health impacts of climate change.

Vicedo-Cabrera, A.M., Scovronick, N., Sera, F. et al. The burden of heat-related mortality attributable to recent human-induced climate change. Nat. Clim. Chang. 11, 492–500 (2021). https://doi.org/10.1038/s41558-021-01058-x

Author(s): A. M. Vicedo-Cabrera, N. Scovronick, A. Gasparrini

Publication Date: 31 May 2021

Publication Site: nature

Bjorn Lomborg: “Climate Change Coverage Ignores the Heavy Impact of heat on cold deaths”

Excerpt:

Earlier this monthlandmark study in Nature made headlines around the world. Rising temperatures from global warming increase the number of heat deaths, now causing a third of all heat deaths, or about 100,000 deaths per year.

Obviously, this is a powerful narrative to justify urgent climate policies.

But the study left out glaring truths that even its own authors have abundantly documented. Heat deaths are declining in countries with good data, likely because of ever more air conditioning. This is abundantly clear for the US, which has seen increasing hot days since 1960 affecting a much greater population. Yet, the number of heat deaths has halved. So while global warming could result in more heat deaths, technological development in, for instance, the US, is actually resulting in fewer heat deaths.

More importantly, cold deaths vastly outweigh heat deaths worldwide. This is not just true for cold countries like Canada but also warmer countries like the US, Spain and Brazil. Even in India, cold deaths outweigh heat deaths by 7-to-1. Globally, about 1.7 million deaths are caused by cold, more than five times the number of heat deaths

Author(s): Bjorn Lomborg

Publication Date: 26 June 2021

Publication Site: Watts Up With That