Heat-Related Hospitalizations in Older Adults: An Amplified Effect of the First Seasonal Heatwave

Liss, Alexander; Wu, Ruiruo; Chui, Kenneth; Naumova, Elena N.

doi:10.1038/srep39581

Cited by 56 publications

(39 citation statements)

References 63 publications

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“…Heatstroke occurs in epidemic form during heat waves, and both hospital emergency department visits and intensive care unit (ICU) admissions increase sharply more so during first seasonal heat waves (14)(15)(16). Consecutive days of heat exposure, even among a heat-acclimated population can increase mortality risk (17,18); low-and middle-income countries are more vulnerable to these adverse effects (19).…”

Section: Discussionmentioning

confidence: 99%

Outcome of heat stroke patients referred to a tertiary hospital in Pakistan: a retrospective study

Tabassum¹,

Raza²,

Shah³

2019

East Mediterr Health J

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Background: Climate change has heightened the threat of heat stroke in previously temperate zones. Aims: This study aimed to assess the outcome of patients in relation to mortality and the role of effect modifiers among heatstroke patients presenting to a tertiary care hospital in Karachi during June 2015. Methods: A retrospective observational study was conducted on heatstroke patients 20-27 June 2015 at the Emergency Room(ER) of a private hospital in Karachi, Pakistan. Patients' demographic data, disease severity, presentation and outcomes were determined. Statistical data was reported as numbers, percentages and mean ± SD. Results: In total, 315 patients reported to ER; 76.6% patients survived, 23% expired. Males were 55% and 60% patients were fully mobile. Hypertension was the most frequent concurrent disorder. Fever documented in 79.4% and CNS derangement in 73.3% patients were the top most presenting features. Fever and disease severity were found to exert significant impact on disease outcome. Mortality rate dropped from 26 June onwards from 24.35% to 15.9% by using evaporative cooling technique combined with air conduction and maintaining room temperature at 22-24°C. Conclusions: Poor outcome during heatstroke can be minimized by advance planning and timely intervention in lowand middle-income countries.

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Section: Discussionmentioning

confidence: 99%

Outcome of heat stroke patients referred to a tertiary hospital in Pakistan: a retrospective study

Tabassum¹,

Raza²,

Shah³

2019

East Mediterr Health J

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“…These daily percentiles are (i) stronger than the seasonal-fixed threshold during peak summer, thus serving to distinguish especially intense cases from more typical ones; (ii) slightly lower than seasonal-fixed threshold during early/late summer, thereby permitting to identify hot extremes at different stages of summer. Daily percentile-based identification is therefore of higher impact relevance by accounting for intraseasonally varying preparedness and acclimatization potential of human and ecosystems against excess heat (Baccini et al, 2008;Liss et al, 2017).…”

Section: Definitions 221 Summertime Hot Extremesmentioning

confidence: 99%

Half‐a‐Degree Matters for Reducing and Delaying Global Land Exposure to Combined Daytime‐Nighttime Hot Extremes

et al. 2019

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The Paris Agreement has motivated rapid analysis differentiating changes in frequency/intensity of weather and climate extremes in 1.5 versus 2°C warmer worlds. However, implications of these global warming levels on locations, spatial scales, and emergence timings of hot spots to extremes are more relevant to policy-making but remain strikingly under-addressed. Based on a bivariate definitional framework, we show that compared to 2°C, the 1.5°C target could avoid a transition of prevailing type of summertime hot extremes from daytime-/nighttime-only events to combined daytime-nighttime hot extremes in approximately 18% of global continents and protect 14-26% of land areas from seeing over threefold-totenfold increases in occurrence of combined hot extremes. This half-a-degree reduction also matters for around 21% of global lands, mostly within the tropics, in constraining historically unprecedented combined hot extremes from becoming the new norm within just one to three decades ahead. By contrast, previous analyses based on univariate-defined hot days substantially underestimate the magnitude, areal extent, and emergence rate of 0.5°C-caused aggravation of summertime hot extremes. These projected changes of bivariate-classified hot extremes, therefore, underline not only the imperative but also the urgency of striving for the lower Paris target.Plain Language Summary Since the milestone Paris Agreement, policymakers are eager to know the extent to which and the time when their own regions will suffer from consequences associated with pertinent global warming levels (1.5 and 2°C). We show that even the aspirational 1.5°C target would still be translated into huge threats from summertime hot extremes to the tropics, as manifested by a type transition toward health-damaging daytime-nighttime combined heat and threefold-to-tenfold increases in its occurrence. Further rise to 2°C would put an extra 20% of global continents at risk from similar transitions and increases. Unexpectedly, despite involving substantial reduction in carbon emissions, the 2°C-compatible development pathway would bring about a rapidly emerging novel era of hot extremes for most tropical countries, where historically unprecedented daytime-nighttime combined heat will be registered every other year within the next one to three decades and thereafter. Our results highlight that the extra 0.5°C of global warming, from 1.5 to 2°C, would impose the earliest and severest heat-related consequences on the least-developed regions, whose adaptive capacity is unfortunately very limited.

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“…Among the suffering to severe heat wave events, the most direct harms are usually considered to be the human morbidity and mortality. The detrimental effect of worldwide extreme heat waves on the increased morbidity and mortality has been demonstrated across quite a few geographical regions including Boston, European wide, southeast Australia, Russia, and India, causing more emergency presentations and hospital admissions during the past decade (Liss et al, ; Sugg et al, ; Dasgupta et al, ; Williams et al, ). Another definition of heat wave named heat index, evaluating the composite anomalies of high temperature and high humidity, is more suitable for the impacts of heat waves on the human well‐being (Oueslati et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

Heat Wave Variations Across China Tied to Global SST Modes

et al. 2020

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Progressive intensification and proliferation of heat waves impose extensively impacts on entire environment and ecology. The far‐reaching implications of heat waves and the severe future projections emphasize the imperative need to explore the driving factors and their quantitative contribution to heat wave variations. In this study, a multiaspect characteristic of heat waves across China during 1961–2017 is evaluated using excess heat factor. Results showed that the number of events, frequency, duration, and intensity has heterogeneous spatial patterns, with a consistent abrupt transition in 1996–1997. The robust positive correlations between heat wave characteristics and warming sea surface temperature (SST) indicate the association of heat wave with SST anomalies. Except the number of events, the other factors (including the frequency, duration, and intensity) of heat waves are strongly influenced by El Niño‐Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD). However, the influences have significant variations from region to region, with the central regions experiencing significant decreases in the frequency, duration, and intensity of heat waves during the simultaneous ENSO phases (El Niño‐La Niña), in comparison with northern and western regions dominated by IOD (positive‐negative) experiencing longer and more frequent heat waves. Particularly, the mild heat waves are more vulnerable to the warming SST modes than severe heat waves. The decrease of heat waves is affected by the convergent winds bringing cold air from the high latitude, while the extensively significant increase of heat waves is controlled by the anomalously sinking motions.

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Heat-Related Hospitalizations in Older Adults: An Amplified Effect of the First Seasonal Heatwave

Cited by 56 publications

References 63 publications

Outcome of heat stroke patients referred to a tertiary hospital in Pakistan: a retrospective study

Outcome of heat stroke patients referred to a tertiary hospital in Pakistan: a retrospective study

Half‐a‐Degree Matters for Reducing and Delaying Global Land Exposure to Combined Daytime‐Nighttime Hot Extremes

Heat Wave Variations Across China Tied to Global SST Modes

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