Worst Effects of Global Warming

Heat Waves



The deadly heat wave that swept across Europe in 2003, killing an estimated 35,000 people, could be the harbinger of an intense heat trend that scientists began tracking in the early 1900s [source: MSNBC].

Extreme heat waves are happening two to four times more often now, steadily rising over the last 50 to 100 years, and are projected to be 100 times more likely over the next 40 years [source: Global Development and Environment Institute, Tufts University]. Experts suggest continued heat waves may mean future increases in wildfires, heat-related illness and a general rise in the planet's mean temperature.


Heat waves not only make it seem difficult to function, they can be deadly as well. This man tried to cool himself with a water bottle during a 2008 heat wave in New York City.


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