Google continues to support relief efforts across the country and across the world with fresh imagery. They’ve just released more imagery from Haiti, which can be accessed using the Historical Imagery tool.
In addition, they’ve released some very fresh imagery from the tornado that recently hit Yazoo City, Mississippi. It’s not yet available directly within Google Earth, but you can download this image overlay to see it. I’d expect the imagery will arrive in the “Historical Imagery” area at some point in the future.