The climate is changing so fast that we have yet to see how bad extreme weather can get

Extreme weather is by definition rare on our planet. Violent storms, scorching heat waves and bitter frosts illustrate what the climate is at its worst. However, as the Earth's climate warms rapidly, mainly due to the burning of fossil fuels, the range of possible weather conditions, including extremes, is changing. Scientists define "climate" as the distribution of possible weather events observed over a period of time, such as the range of temperatures, precipitation totals, or hours of sunshine. From this they construct statistical measurements such as average (or normal) temperature. Weather changes on several timescales—from seconds to decades—so the longer the period over which the climate is analyzed, the more accurately these analyzes capture the infinite range of possible atmospheric configurations. (Simon H. Lee, Hayley J. Fowler and Paul Davies, The Conversation, more at phys.org)