Although California has perhaps had it the worst, drought also affects other states, mainly the southwestern ones. Mike Bostock and Kevin Quealy for the New York Times have been updating an animated map weekly. It shows the spread of drought severity, across the United States. But, be sure to scroll down to also see drought levels over time, shown as stacked area chart.
Mapping the spread of drought, nationally
Where Bars Outnumber Grocery Stores
A closer look at the age old question of where there are more bars than grocery stores, and vice versa.
Life expectancy changes
The data goes back to 1960 and up to the most current estimates for 2009. Each line represents a country.
10 Best Data Visualization Projects of 2015
These are my picks for the best of 2015. As usual, they could easily appear in a different order on a different day, and there are projects not on the list that were also excellent.