scholarly journals Impacts of heat stress conditions on mortality from respiratory and cardiovascular diseases in Brazil

2020 ◽  
Vol 11 (3) ◽  
pp. 297-330
Author(s):  
Beatriz Fátima Alves de Oliveira ◽  
Ludmilla da Silva Viana Jacobson ◽  
Letícia Palazzi Perez ◽  
Ismael Henrique da Silveira ◽  
Washington Leite Junger ◽  
...  
Keyword(s):  
Heat Stress ◽  
Respiratory Diseases ◽  
Stress Conditions ◽  
Response Curves ◽  
Capital Cities ◽  
Wet Bulb Globe Temperature ◽  
Risk Of Exposure ◽  
Potential Impact ◽  
Globe Temperature ◽  
The Impact

This study assesses the risk of exposure to heat stress conditions and their potential impact on mortality from cardiovascular and respiratory diseases in Brazilian capital cities for warming levels of 1.5 °C, 2.0 °C and 4.0 °C in the RCP8.5 scenario. The risk of exposure and the impact of heat stress conditions on mortality were measured by the Wet Bulb Globe Temperature (WBGT) index. The impact on health was estimated by applying exposure-response curves between WBGT and health outcomes in the projections. The potential impact on mortality was measured by attributable fraction of mortality due to heat stress. The results showed an increase in heat stress conditions for Brazil, especially in the Northern and Center-Western regions. The estimated curves showed an association between the WBGT and mortality by cardiovascular and respiratory diseases in Brazil, with an upward impact trend, according to the levels of warming and heterogeneous results among the capitals.  

EFFECTS OF INONIZING RADIATION CAUSED HEAT STRESS ON THE HUMAN BODY FOR STANDARD ISO 7243

2013 ◽  
pp. 47-57
Author(s):  
Van Trong Le ◽  
Thi Tuyet Mai Nguyen ◽  
Thi Xuan Duyen Nguyen ◽  
Ba Luan Nguyen ◽  
Tuyen Pham ◽  
...  
Keyword(s):  
Heat Stress ◽  
Risk Assessments ◽  
Management Systems ◽  
Temperature Index ◽  
Wet Bulb Globe Temperature ◽  
Simple Index ◽  
Simple Tool ◽  
Results Management ◽  
Globe Temperature ◽  
Hot Environments

Objectives: Presents heat stress Standard ISO 7243, which is based upon the wet bulb globe temperature index (WBGT), and considers its suitability for use worldwide. Materials and Methods: The WBGT index are considered and how it is used in ISO 7243 and across the world as a simple index for monitoring and assessing hot environments. Results: Management systems, involving risk assessments, that take account of context and culture, are required to ensure successful use of the standard and global applicability. For use outdoors, a WBGT equation that includes solar absorptivity is recommended. A ‘clothed WBGT’ is proposed to account for the effects of clothing. Conclusion: ISO 7243 is a simple tool to assess the heat stress and may be applicated worldwide.

Consistency Assessment of Heat Stress Monitoring of Outdoor Workers Using Sweat Rate Measurement and Wet Bulb Globe Temperature WBGT in Arid and Semi-Arid Climates

Health Scope ◽  
2018 ◽  
Vol In Press (In Press) ◽  
Author(s):  
Hamidreza Heidari ◽  
Farideh Golbabaei ◽  
Aliakbar Shamsipour ◽  
Abbas Rahimi Forushani ◽  
Abbasali Gaeini
Keyword(s):  
Heat Stress ◽  
Sweat Rate ◽  
Rate Measurement ◽  
Stress Monitoring ◽  
Wet Bulb Globe Temperature ◽  
Outdoor Workers ◽  
Globe Temperature ◽  
Semi Arid

scholarly journals Trend Analysis and Temporal and Spatial Distribution of Wet Bulb Globe Temperature as a Heat Stress Index in Iran during the Summer Season over a 30-year Period

2021 ◽  
Author(s):  
Gholamabbas Fallah Ghalhari ◽  
Somayeh Farhang Dehghan ◽  
Elham Akhlaghi Pirposhteh ◽  
Mehdi Asghari
Keyword(s):  
Global Warming ◽  
Heat Stress ◽  
Stress Index ◽  
Upward Trend ◽  
Temporal And Spatial Distribution ◽  
Wet Bulb Globe Temperature ◽  
Globe Temperature ◽  
June July ◽  
Heat Stress Index ◽  
High Range

Introduction: Global warming is one of the most important environmental problems that have raised researchers’ attention. The present study aimed to analyze heat stress trends using the Wet Bulb Globe Temperature (WBGT) index in the country of Iran during the summer over a 30-year period. Materials and Methods: Daily summertime statistical data regarding mean temperature and mean relative humidity, taken from 40 synoptic meteorological stations across Iran during a 30-year period were obtained from the Iranian National Meteorological Department. The De Martonne climate classification system was used to categorize various climate regions of Iran. The WBGT index was calculated using the formula given by the Australian Bureau of Meteorology. The Mann-Kendall statistical test and the Sen's slope estimator were used to analyze the trends of the WBGT index. Results: The WBGT index had an upward trend during the three months of June, July, and August in 71.42%, 57.14%, and 66.66% of all stations and this trend was statistically significant in 53.32%, 50%, and 42.85% of those stations, respectively. Moreover, throughout the summer, 45% of the WBGT index measurements were in the medium range (18-23°C), 37.5% were in the high range (23-28°C), and 17.5% were in the very high range (> 28°C). Conclusion: The WBGT index followed an upward trend during the summer, especially in semi-arid regions of Iran. Considering the phenomenon of global warming, it is essential to monitor, plan ahead, and take necessary precaution measures for sensitive populations who are at high risk areas of the country.

scholarly journals Contribution of open-air concrete slabs to the heat stress on working mano

2018 ◽  
Author(s):  
Alex Augusto Marcelo ◽  
Lucila Chebel Labaki ◽  
Adriana Eloá Bento Amorim
Keyword(s):  
Heat Stress ◽  
Construction Industry ◽  
Sao Paulo ◽  
Concrete Slabs ◽  
São Paulo ◽  
Temperature Index ◽  
Wet Bulb Globe Temperature ◽  
Index Data ◽  
Globe Temperature ◽  
The City

The objective of this work was to evaluate the heat stress on workers of the construction industry on open-air concrete slabs in the city of Campinas, São Paulo, Brazil. Brazilian NR-15 provides a method for evaluating the heat stress to which a person is exposed using the WBGT (wet bulb globe temperature) index, prescribing rest pauses according to the type of activity. The methodology included measurements of environmental thermal variables and atmospheric quantities, followed by the calculation of the WBGT index. Data was collected at 12 different locations from August/2017 to March/2018, covering three diferent seasons. Results show that moderate and heavy activities on concrete slabs require pauses in every month, except in August.

scholarly journals A Pilot Observational Study Comparing Wet Bulb Globe Temperature (WBGT) Parameter Measurements Between Three Commercial Kitchen Configurations

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Madison Ellis ◽  
Rod Handy ◽  
Darrah Sleeth ◽  
Leon Pahler ◽  
Camie Schaefer
Keyword(s):  
Heat Stress ◽  
Observational Study ◽  
Statistical Power ◽  
Occupational Injury ◽  
High Stress ◽  
Descriptive Statistics ◽  
Future Studies ◽  
Wet Bulb Globe Temperature ◽  
Test Of Significance ◽  
Globe Temperature

Line cooks in commercial restaurants work intense, high-stress shifts during near sources of heat, rendering them vulnerable to heat stress and occupational injury. However, there is a dearth of literature on heat stress among this population. This study investigated three common commercial kitchen configurations—zone, island, and assembly—to determine which design experiences the highest temperatures and if temperatures were in excess of recommended levels. A total of 11 restaurants were sampled for temperature using a Wet Bulb Globe Thermometer (WBGT). Descriptive statistics indicated that, on average, zone configurations are hotter than other kitchens and could pose a risk of heat stress; however, a Kruskal-Wallis test of significance revealed that this distinction was not statistically significant. Two measurements for zone kitchens were borderline significant, suggesting that future studies with greater statistical power would find significant differences between the kitchen types and further illuminate the risk of heat stress.

Influence of exercise and heat stress on pulmonary function during ozone exposure

1977 ◽  
Vol 43 (3) ◽  
pp. 409-413 ◽  
Author(s):  
L. J. Folinsbee ◽  
S. M. Horvath ◽  
P. B. Raven ◽  
J. F. Bedi ◽  
A. R. Morton ◽  
...  
Keyword(s):  
Heat Stress ◽  
Pulmonary Function ◽  
Exposure Period ◽  
Ozone Exposure ◽  
Wet Bulb Globe Temperature ◽  
Exercise Period ◽  
Maximum Expiratory Flow ◽  
Group A ◽  
Globe Temperature ◽  
Group B

We studied the effects of a 2-h exposure to ozone (0.5 ppm) in 14 nonsmoking males under four environmental conditions (WBGT (wet bulb-globe temperature index) = 64.4, 80.0, 85.2, and 92.0 degrees F). The subjects were divided into two groups, A (n = 8) and B (n = 6). Thirty minutes of exercise at 40% Vo2 max was performed from 60 to 90 min for group A and 30 to 60 min for group B. Pulmonary function changes, determined throughout exposure, were greatest immediately after exercise in both groups. Few changes occurred before the exercise period. However, the decrease in FVC (826 ml) and FEV1.0 (937 ml) following exercise was more than twice as large as the decrement seen at end exosure (388 and 423 ml, respectively). Measures of maximum expiratory flow (FEF 25–75%, FEF 50% FEF 75%) showed similar reductions. In many cases, reversal of these changes occurred during the remainder of the exposure period. The greatest decrease in FVC occurred when heat and ozone exposures were combined (WBGT = 92.0 degrees F). We conclude that the effects of ozone are most severe immediately after exercise and that heat stress may modify the overall effect of ozone on pulmonary function.

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