Impacts of Climate Change More Dire Than Previously Predicted

The draft of a new report issued last week by the U.S. government concludes the impacts of climate change are spreading faster than previously predicted.

2 minute read

January 14, 2013, 8:00 AM PST

By Jonathan Nettler @nettsj


Authored by 240 scientists, business leaders and other experts, the draft of the Third National Climate Assessment [PDF] that was released last week "delivers a bracing picture of environmental changes and natural disasters that mounting scientific evidence indicates is fostered by climate change: heavier rains in the Northeast, Midwest and Plains that have overwhelmed storm drains and led to flooding and erosion; sea level rise that has battered coastal communities; drought that has turned much of the West into a tinderbox," reports .

"Climate change, once considered an issue for a distant future, has moved firmly into the present," the report says. "Americans are noticing changes all around them. Summers are longer and hotter, and periods of extreme heat last longer than any living American has ever experienced. Winters are generally shorter and warmer."

"The findings in the report are a three-alarm fire," said Rep. Henry A. Waxman (D-Beverly Hills). "Climate change is already causing widespread disruption across the nation. We are in deep trouble if we don't act forcefully this year."

Over at The Washington Post's Wonkblog, Brad Plumer shares one of the more striking graphics from the report, which shows projected temperature changes by 2100 under four different scenarios. Under the most extreme (but entirely plausable) scenario, "in which we continue to burn fossil fuels at our current rate with no effort to tackle emissions....average temperatures in the United States rise somewhere between 5°F and 10°F by century’s end (or 2.8°C to 5.5°C)," notes Plumer. "A few parts of the country get up to 15°F hotter. Needless to say, that’s significant."

Friday, January 11, 2013 in Los Angeles Times

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Cover CM Credits, Earn Certificates, Push Your Career Forward

Logo for Planetizen Federal Action Tracker with black and white image of U.S. Capitol with water ripple overlay.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

July 16, 2025 - Diana Ionescu

Green vintage Chicago streetcar from the 1940s parked at the Illinois Railroad Museum in 1988.

Chicago’s Ghost Rails

Just beneath the surface of the modern city lie the remnants of its expansive early 20th-century streetcar system.

July 13, 2025 - WTTV

Blue and silver Amtrak train with vibrant green and yellow foliage in background.

Amtrak Cutting Jobs, Funding to High-Speed Rail

The agency plans to cut 10 percent of its workforce and has confirmed it will not fund new high-speed rail projects.

July 14, 2025 - Smart Cities Dive

Worker in yellow safety vest and hard hat looks up at servers in data center.

Ohio Forces Data Centers to Prepay for Power

Utilities are calling on states to hold data center operators responsible for new energy demands to prevent leaving consumers on the hook for their bills.

July 18 - Inside Climate News

Former MARTA CEO Collie Greenwood standing in front of MARTA HQ with blurred MARTA sign visible in background.

MARTA CEO Steps Down Amid Citizenship Concerns

MARTA’s board announced Thursday that its chief, who is from Canada, is resigning due to questions about his immigration status.

July 18 - WABE

Rendering of proposed protected bikeway in Santa Clara, California.

Silicon Valley ‘Bike Superhighway’ Awarded $14M State Grant

A Caltrans grant brings the 10-mile Central Bikeway project connecting Santa Clara and East San Jose closer to fruition.

July 17 - San José Spotlight