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To examine whether high ambient temperature and diurnal temperature range during the summer are associated with risk of stroke/transient ischemic attack (TIA). A time-stratified case-crossover study design was conducted. The study sample comprised all individuals aged ≥50 years who had a stroke/TIA reported to the Israeli National Stroke Registry between 2014 and 2016 during the summer season. Daily temperature data were retrieved from the Israel Meteorological Service. Conditional logistic regression models were used with relative humidity and air pollution as covariates. The sample included 15,123 individuals who had a stroke/TIA during the summer season (mean age 73 ± 12 years; 54% males). High ambient temperature was associated with stroke/TIA risk starting from the day before the stroke event, and increasing in strength over a six-day lag (OR = 1.10 95%CI 1.09–1.12). Moreover, a larger diurnal temperature range prior to stroke/TIA occurrence was associated with decreased stroke/TIA risk (OR = 0.96 95%CI 0.95–0.97 for a six-day lag). High ambient temperature may be linked to increased risk of cerebrovascular events in subsequent days. However, relief from the heat during the night may attenuate this risk. • Weather conditions are emerging as novel risk factors for stroke. • High temperatures were associated with increased stroke risk. • A lag period of 1–6 days existed between the day of exposure and the stroke event. • Larger diurnal temperature ranges were linked with reduced stroke risk. [ABSTRACT FROM AUTHOR]

The Mediterranean Basin is undergoing a warming trend with longer and warmer summers, an increase in the frequency and the severity of heat waves, changes in precipitation patterns and a reduction in rainfall amounts. In this unique populated region, which is characterized by significant gaps in the socio-economic levels particularly between the North (Europe) and South (Africa), parallel with population growth and migration, increased water demand and forest fires risk - the vulnerability of the Mediterranean population to human health risks increases significantly. Indeed, climatic changes impact the health of the Mediterranean population directly through extreme heat, drought or storms, or indirectly by changes in water availability, food provision and quality, air pollution and other stressors. The main health effects are related to extreme weather events (including extreme temperatures and floods), changes in the distribution of climate-sensitive diseases and changes in environmental and social conditions. The poorer countries, particularly in North Africa and the Levant, are at highest risk. Climate change affects the vulnerable sectors of the region, including an increasingly older population, with a larger percentage of those with chronic diseases, as well as poor people, which are therefore more susceptible to the effects of extreme temperatures. For those populations, a better surveillance and control systems are especially needed. In view of the climatic projections and the vulnerability of Mediterranean countries, climate change mitigation and adaptation become ever more imperative. It is important that prevention Health Action Plans will be implemented, particularly in those countries that currently have no prevention plans. Most adaptation measures are "win-win situation" from a health perspective, including reducing air pollution or providing shading solutions. Additionally, Mediterranean countries need to enhance cross-border collaboration, as adaptation to many of the health risks requires collaboration across borders and also across the different parts of the basin. • Climate change impacts the health of the Mediterranean population. • The main effects are related to extreme events, VBD and changes in local conditions. • The poorer countries, mainly in North Africa and the Levant, are at highest risk. • Based on projections, mitigation and adaptation become ever more imperative. • Prevention plans related to health should be implemented together with cross-border collaboration. [ABSTRACT FROM AUTHOR]

A growing body of literature reports associations between exposure to particulate matter with diameter ≤2.5 μm (PM 2.5) during pregnancy and birth outcomes. However, findings are inconsistent across studies. To assess the association between PM 2.5 and birth outcomes of fetal growth in a cohort with high prevalence of siblings by multilevel models accounting for geographical- and mother-level correlations. In Israel, we used Maccabi Healthcare Services data to establish a population-based cohort of 381,265 singleton births reaching 24–42 weeks' gestation and birth weight of 500–5000 g (2004–2015). Daily PM 2.5 predictions from a satellite-based spatiotemporal model were linked to the date of birth and maternal residence. We generated mean PM 2.5 values for the entire pregnancy and for exposure periods during pregnancy. Associations between exposure and birth outcomes were modeled by using multilevel logistic regression with random effects for maternal locality of residence, administrative census area (ACA) and mother. In fully adjusted models with a mother-level random intercept only, a 10-μg/m3 increase in PM 2.5 over the entire pregnancy was positively associated with term low birth weight (TLBW) (Odds ratio, OR = 1.25, 95% confidence interval, CI: 1.09,1.43) and small for gestational age (SGA) (OR = 1.15, 95% CI: 1.06,1.26). Locality- and ACA-level effects accounted for <0.4% of the variance while mother-level effects explained ∼50% of the variability. Associations varied by exposure period, infants' sex, birth order, and maternal pre-pregnancy BMI. Consideration of mother-level variability in a region with high fertility rates provides new insights on the strength of associations between PM 2.5 and birth outcomes. • New evidence from the Middle East – a region with scarce data. • Maternal exposure to PM2.5 was associated with fetal growth outcomes. • Associations were clearer when mother-level clustering in the data was accounted for. • Associations were modified by infant's sex, birth order and maternal pre-pregnancy BMI. • Associations were highest for low socio-economic status and for third trimester of pregnancy. [ABSTRACT FROM AUTHOR]