The problem is warmer periods are warmer and getting warmer, this of course leads to more evaporation and at some point more precipitation,which leads to flooding.
I don't think it means that we will get consistently warm / hot weather, the changes mean things like hurricanes will be more frequent and perhaps more intense. We get more flooding, with ice caps melting we get sea rises.
As there are ocean currents which also impact weather patterns these change and cause more frequent events.
One reason the term climate change is better than global warming.