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Death tolls from summer heat waves are hazy

2013-08-17 16:00:00| Climate Ark Climate Change & Global Warming Newsfeed

Wall Street Journal: Hot weather can be deadly, but a summer's full toll often isn't known until after fall has arrived. When a heat wave strikesas it has this summer in the U.S., Europe and Chinadeath rates rise. But heat's role usually isn't readily apparent. Instead, its victims die of underlying conditions, usually of the heart or lungs, that needed the extra ingredient of heat to become fatal. Moreover, those who succumb to heat often die alone and aren't discovered until after their bodies have cooled. So heat's...

Tags: death summer heat waves

Rise in Extreme Heat Waves Already Locked in for Next 30 Years

2013-08-16 23:02:00| Climate Ark Climate Change & Global Warming Newsfeed

Nature World: The amount of global land affected by extreme heat waves classified as three-sigma events is set to double by 2020 and quadruple by 2040 regardless of changes in the amount of carbon dioxide released into the atmosphere, a study published in Environmental Research Letters reports. Heat waves classified as three-sigma events -- a reference to a rise in temperatures of three standard deviations above the norm -- include the one that hit Australia in 2009 and more recently the one that took place...

Tags: next years rise extreme

Heat waves make cities swelter synergistically

2013-08-06 16:00:00| Climate Ark Climate Change & Global Warming Newsfeed

Scientific American: No wonder its gonna be a hot time in the old town tonight. Cities can be anywhere from 2 to 20 degrees Fahrenheit hotter than nearby countryside, due to whats known as the "urban heat island" effect. But when heat waves roll through, they interact synergistically with the urban heat islandboosting temperatures even higher than you might expect. Researchers used a June 2008 heat wave in Baltimore as a case study. They compared temperatures downtown to those near the Baltimore/Washington International...

Tags: make cities heat waves