One theory is that a cooling event at the end of the Eocene dried up swamps and rivers, forcing animals out on to the land.

BBC: Elephant 'had aquatic ancestor'

Just such an aerosol effect is believed to have disrupted the Earth's thermal balance during the Laki event, cooling some Northern Hemisphere regions by as much as 1 or more degrees Celsius below the long-term average.

CNN: How volcanoes can change the world

For example, significant cooling and strong dynamical effects after the Laki event and other high-latitude eruptions are believed to have caused decreased flow of the Nile River in Egypt and weakened African and Asian monsoons based on climate model simulations, with potentially very significant impacts on food and water supplies.

CNN: How volcanoes can change the world

To respond to an event like this requires an abstraction of the application from the power and cooling infrastructure and the building itself.

FORBES: Why Software-Defined Data Centers Cost Much More Without Optimized Power and Cooling