Amount by which the surface temperatures on some streets in Phoenix, Arizona (measured in degrees Fahrenheit) was reduced after the application of a reflective, gray-colored paint.
That’s the top of the average range (10.5 to 12 degrees was the overall average), and the reduction was lower at sunrise (an average of 2.4 degrees).
But in desert climates like those in Phoenix, during a period of overall warming dotted with semi-regular extreme heat blips, relatively simple and inexpensive solutions like this one (which was tested by researchers to assess its potency) are getting a lot more attention.
—Scientific American