TY - JOUR
T1 - Perceived heat stress increases with population density in urban Philippines
AU - Zander, Kerstin K.
AU - Cadag, Jake Rom
AU - Escarcha, Jacquelyn
AU - Garnett, Stephen T.
PY - 2018/7/27
Y1 - 2018/7/27
N2 - The world’s population is increasingly urban, with more than half the global population already living in cities. The urban population is particularly affected by increasing temperatures because of the urban heat island (UHI) effect. Increasing temperatures cause heat stress in people, even when not directly exposed to heat, since outdoor meteorological conditions also affect conditions inside, particularly in non-air-conditioned environments. Heat stress harms people’s health, can impair their well-being and productivity, and may cause substantial economic losses. In this study, we investigate how people in urban areas across the Philippines are affected by heat, using data from 1161 responses obtained through an online survey. We found that almost all respondents (91%) are already experiencing heat stress quite severely and that the level of heat stress is correlated with population density. Controlling, in a multiple log it model, for variables commonly associated with heat stress, such as age, health, physical exertion and climate, we found that those least likely to be severely affected by heat live in areas with fewer than ∼7000 people per km2. Air-conditioning use at home relieved heat stress mostly for people in low-density areas but not where population density was high. The results provide evidence for the social impacts of increasing heat in urban areas, complementing understanding of well-known physical impacts such as the UHI effect.
AB - The world’s population is increasingly urban, with more than half the global population already living in cities. The urban population is particularly affected by increasing temperatures because of the urban heat island (UHI) effect. Increasing temperatures cause heat stress in people, even when not directly exposed to heat, since outdoor meteorological conditions also affect conditions inside, particularly in non-air-conditioned environments. Heat stress harms people’s health, can impair their well-being and productivity, and may cause substantial economic losses. In this study, we investigate how people in urban areas across the Philippines are affected by heat, using data from 1161 responses obtained through an online survey. We found that almost all respondents (91%) are already experiencing heat stress quite severely and that the level of heat stress is correlated with population density. Controlling, in a multiple log it model, for variables commonly associated with heat stress, such as age, health, physical exertion and climate, we found that those least likely to be severely affected by heat live in areas with fewer than ∼7000 people per km2. Air-conditioning use at home relieved heat stress mostly for people in low-density areas but not where population density was high. The results provide evidence for the social impacts of increasing heat in urban areas, complementing understanding of well-known physical impacts such as the UHI effect.
KW - Adaptation
KW - Air-conditioning
KW - Climate change impact
KW - Increasing temperatures
KW - South East Asia
KW - Survey
KW - Urbanization
UR - http://www.scopus.com/inward/record.url?scp=85056504922&partnerID=8YFLogxK
U2 - 10.1088/1748-9326/aad2e5
DO - 10.1088/1748-9326/aad2e5
M3 - Article
AN - SCOPUS:85056504922
SN - 1748-9318
VL - 13
SP - 1
EP - 8
JO - Environmental Research Letters
JF - Environmental Research Letters
IS - 8
M1 - 084009
ER -