The 27 US Cities Likely To Face The Dark Side Of Climate Change

philadelphia 12 30Philadelphia is high on the list of US cities vulnerable to increased power cuts. Image: Thesab via Wikimedia Commons

As global temperatures rise, scientists warn that more cities in the US face the threat of power blackouts caused by fierce and frequent hurricanes.

Climate change could leave more Americans in the dark as hurricanes become more intense or more frequent.

Researchers in the US have identified 27 cities that are likely to become more vulnerable to blackouts as a result of floods and high winds hitting the power grid.

They report in the journal Climatic Change that they matched evidence from the past – historic hurricane information – with scenarios for future storm behaviour throughout the US as global temperatures rise. And then they looked at those cities most vulnerable.

Big Increase

Top of the list were New York, Philadelphia, Jacksonville, Virginia Beach and Hartford, which all could see a big increase in future risk of power cuts.

The cities most likely to keep the lights burning are Memphis, Dallas, Pittsburgh, Atlanta, and Buffalo.

In fact, there is no certainty about how global warming will affect hurricane patterns. As sea surface temperatures rise above 28°C, hurricanes tend to become more likely, and there is evidence that tropical cyclones in the Northern hemisphere are increasingly likely to threaten cities once considered beyond the hazard zone.

But hurricanes are capricious monsters, and how their characteristics will change with warmer atmosphere is still debated. So the scientists looked at a range of possibilities.

Cities already at risk – such as Miami and New Orleans – will remain at risk. But New York and Philadelphia, and even some inland urban areas, could become susceptible to increasing storm activity.

For New York – devastated by Superstorm Sandy in 2012 – and Philadelphia, the probability of the kind of storm previously considered a once-a-century event is likely to increase by 50%. More people would lose power more often, and the worst storms could be substantially more intense.

Future Hazards

The point of the research is to make civic authorities more aware of potential future hazards.

“We provide insight into how power systems along the Gulf and Atlantic coasts may be affected by climate changes, including which areas should be most concerned and which ones are unlikely to see substantial change,” said Seth Guikema, a geographer at Johns Hopkins University in Baltimore.

“If I’m mayor of Miami, we know about hurricanes, we know about outages, and our system has been adapted for it. But if I’m mayor of Philadelphia, I might say: ‘Whoa, we need to be doing more about this.’” – Climate News Network

About the Author

Tim Radford, freelance journalistTim Radford is a freelance journalist. He worked for The Guardian for 32 years, becoming (among other things) letters editor, arts editor, literary editor and science editor. He won the Association of British Science Writers award for science writer of the year four times. He served on the UK committee for the International Decade for Natural Disaster Reduction. He has lectured about science and the media in dozens of British and foreign cities. 

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