These are NOAA graphs examining extreme drought and extreme rainfall since 1900. Yup, that global warming is sure causing more extremes today than have been experienced in the past–say in the 1930s or 50s or 70s. Well, maybe not.

http://www.ncdc.noaa.gov/sotc/service/drought/wetdry/bar-mod-110-00/190001-201106.gif