Harvey spells it out: markets alone won't protect you | Joseph Stiglitz

We should have learned the lessons of Hurricanes Katrina and Sandy - we need political action to help prevent disasters

Tropical Storm Harvey has left in its wake upended lives and enormous property damage, estimated by some at $150-$180bn. But the storm that pummelled the Texas coast for the better part of a week also raises deep questions about the United States' economic system and politics.

It is ironic, of course, that an event so related to climate change would occur in a state that is home to so many climate-change deniers - and where the economy depends so heavily on the fossil fuels that drive global warming. Of course, no particular climate event can be directly related to the increase in greenhouse gases in the atmosphere. But scientists have long predicted that such increases would boost not only average temperatures, but also weather variability - and especially the occurrence of extreme events such as Harvey. As the Intergovernmental Panel on Climate Change concluded several years ago, "There is evidence that some extremes have changed as a result of anthropogenic influences, including increases in atmospheric concentrations of greenhouse gases." Astrophysicist Adam Frank succinctly explained: "Greater warmth means more moisture in the air which means stronger precipitation."

Related: After the storm: how should cities rebuild post hurricanes like Harvey and Irma?