Look for long-term trends rather than individual weather events as evidence of climate change
Hurricane Irma is wreaking devastation in the Caribbean this month. Deplorable as it is as a single extreme weather event, let's not forget that the evidence for climate change is not based on a single event such as this, but rather on a large body of evidence over long timescales.
When asked if a single weather event proves climate change, I point to the long-term data trends. That way, I can't be accused of being inconsistent when someone points to a particularly cold Winter weather event and I say "that doesn't disprove climate change - look at the long-term trends".
The Planetary CFO - working towards a sustainable World Balance Sheet.