Extreme Heat in Summer 2010: A Window on the Future, this report from the National Wildlife Federal states that as global temperature records have been set for the early summer months, states and cities are also setting hundreds of temperature records. More than 70 million Americans experienced extreme heat during June and July.
Unfortunately, climate models indicate that an average summer in 2050 will have even more days topping 90°F if global warming continues unabated. For example, Washington, DC is on track to have about 50 days of 90°F or hotter weather in summer 2010. By midcentury, an average summer could have 55 to 100 such days, depending on how much we curb global warming pollution.
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