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What Passing a Key CO2 Mark Means to Climate Scientists

We're likely living in a post-400 ppm world. Here's what it means to scientists that study the climate.

The Forgotten U.N. Climate Goal: 1.5°C

Island nations and others are desperate to keep global warming to less than 1.5°C, or 2.7°F.

Climate Matters: States At Risk

States at Risk: America’s Preparedness Report Card summarizes the changing nature of key threats and corresponding levels of preparedness in…

A Danger Days Update: Extreme Heat Still Surging

Warming temperatures are about to push U.S. cities into a new regime where danger days are more common.

One Graph Shows El Niño’s New Record

El Niño hit a weekly temperature record and is likely to keep upping the heat globally.

U.S. Thirst for Oil Straining International Water Supplies

U.S. energy demand strains global water supplies in a warming world.

Paris Pact May Hinge on ‘Loss and Damage’ Dispute

Vulnerable countries want financial help from rich ones to cope with climate change disasters.

Flurry of Hawaiian Hurricanes Shows Climate Fingerprints

Hawaii's active hurricane streak has a climate change tie and could be a sign of things to come.

8 Western States Have Warmest Year So Far

Eight western states have recorded their warmest year-to-date through October, and the Lower 48 could see a Top 10.

Bitterly Cold Winters Less Likely for East Coast

Warming has made the cold of 2013-2014 less likely, but that winter's storms couldn't be linked to climate change.

Attribution Studies Home in on Climate Change Signal

The role of climate change in extreme weather events is examined in an annual compilation of attribution studies.

Warming Is Increasing Wildfire Risks in California

Climate change is worsening wildfire risks in the West, but pinpointing its effects remains difficult.

Extreme Heat Is Defining Climate Change

The signal attributing extreme heat events to climate change is "very strong," according to new findings.

New York Prepares for Up to 6 Feet of Sea Level Rise

New York State is anticipating up to 6 feet of sea level rise on its coastlines by 2100.

Half Million Die in Decade of Disasters in Asia Pacific

The region's disasters claimed half a million lives over the decade, and $523 billion in economic damage.

Paris Agreement Could Put Leash Around Global Warming

World governments are cooperating as they work to slip a leash around global warming, but more is needed.

Warming May Mean Stifling Future for Middle East

Global warming means more intense heat and humidity for the Middle East by the end of the century.

Patricia, Record-Setting Monster, Beelines For Mexico

Hurricane Patricia is a record-breaking Category 5 storm that will lash Mexico with deadly winds, storm surge and rain.

The Shum Show: Winter Forecast With a Climate Twist

We get a sneak-peek at this winter, but we’ve got record heat in the Southwest and in the oceans.

This is the First Full Earth Image From a Weather Satellite

Happy 40th anniversary to one of the world's first major weather satellites.


November Heating Up The unusual warmth that started this fall is extending into November.

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