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[0] Research examples [2] On average, the most intense rain events—like 2011’s Hurricane Irene across the mid-Atlantic—can be expected to produce 5–10% more rain than before, because there is up to 7% more water vapor in the air for every 1°C rise in temperature (4% for every 1°F). [research summary] [3] It’s likely that the accumulation of human-produced greenhouse gases to date has at least doubled the odds of a heat wave in Europe as intense as the one in 2003, when tens of thousands of people perished. [research summary] [1] 
July temperatures across western Russia over the last century show large natural variability, but we cannot find evidence of climate trends during that period that would cause a heat wave on par with the disaster that struck Moscow in 2010. [research summary]
Extreme weather forensics | UCAR - University Corporation for Atmospheric Research
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