Due to higher precipitation rates many areas face an increased risk of flooding and drought. Heavy precipitation events (as a proportion of total precipitation from heavy rainfalls) are very likely to happen more frequently. This may result in rain-generated floods. Other regions face an increased frequency of extreme drought. In semi-arid regions the variability and magnitude of rainfall-events strengthen the risk of soil loss and the devolpment of badlands.
Additionally, there is a trend towards drying in continental interiors, in particular in the subtropics, low and mid-latitudes during the summer months. 
See also excess water and water scarcity.
- ↑ Intergovernmental Panel on Climate Change (2008): Technical Paper on Climate Change and Water. Finalized at the 37th Session of the IPCC Bureau. http://www.ipcc.ch/meetings/session28/doc13.pdf [accessed 31 May 2013]