Climate change makes wet places wetter, and dry places drier:

https://web.archive.org/web/20131106092018/https://www.ncas.ac.uk/index.php/en/climate-science-highlights/463-wet-regions-getting-wetter-dry-regions-drier-as-planet-warms

EXCEPT FOR WHEN

It makes wet places drier and dry places wetter:

https://web.archive.org/web/20151007185423/https://mashable.com/2015/10/05/south-carolina-floods-global-warming/#GuiCHPD69Pql