Guardian article suggests that the threat of the U.S. temperature rising from 55.3 F to 57.3 F over a few decades is sort of like the threat of 1,830 deg. F gas and rock hurtling towards our families at 450 mph

Civilisation and the environment: ashes to ashes | The Guardian

The disasters looming ahead of us are less acute and more complicated, but with 17 years' notice we ought to be able somehow to get a grip on energy use and population growth. Should we fail to do so, a history that discovers books on climate change among our own rubble may be less forgiving about us. All the more so because the environmental ruin that we are unleashing could preclude any rebirth of prosperity for a very long time.

Pyroclastic flow - Wikipedia, the free encyclopedia

A pyroclastic flow (also known scientifically as a pyroclastic density current) is a fast-moving current of hot gas and rock (collectively known as tephra), which reaches speeds moving away from a volcano of up to 700 km/h (450 mph). The gas can reach temperatures of about 1,000 °C (1,830 °F).

Flashback:  NOAA: 2012 Hottest & 2nd-Most Extreme Year On Record | Climate Central

According to the National Oceanic and Atmospheric Administration (NOAA), 2012 had an average temperature of 55.3°F