A new paper (actually came out last month, so not quite “snap snap” new) by Kostas Andreadis and Dennis Lettenmaier looks at trends in drought severity and duration over the 20th century in the continental U.S. In much of the country, drought is getting less severe, but unfortunately not in the places that matter most – the arid west, where we humans are living closest to the water margins.
 Andreadis, K. M., and D. P. Lettenmaier (2006), Trends in 20th century drought over the continental United States, Geophys. Res. Lett., 33, L10403, doi:10.1029/2006GL025711.