Behold the snow pack in Yosemite on December 23rd, 2010.  A massive blanket of white, that only got deeper as the winter wore on.

In contrast, below you can see the situation today, July 28th, 2011.  There looks to be a fire somewhere, as there is suddenly a lot of smoke in the park.  In addition, all that snow has melted, run off or soaked in.  What an amazing transformation.