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More Hot Days Across the U.S.

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More Hot Days Across the U.S.

See the trend in hot days in these U.S. cities.

Small Change in Average, Big Change in Extremes

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Small Change in Average, Big Change in Extremes

A small increase in average temperature leads to a big increase in extreme heat.

Days Above 100°F: Projections

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Days Above 100°F: Projections

This is how hot the United States could be in the future.

Dead Zones: Warming Oceans Hold Less Oxygen

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Dead Zones: Warming Oceans Hold Less Oxygen

Warming waters are decreasing oxygen in the oceans, creating dead zones for marine plants and animals.

As CO2 Goes Up, Ocean Health Goes Down

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As CO2 Goes Up, Ocean Health Goes Down

Excessive carbon emissions are worsening the ocean's health.

Summers Are Getting Hotter

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Summers Are Getting Hotter

Summers are getting hotter across most of the country.

Hottest Days Coming Earlier

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Hottest Days Coming Earlier

The first day with summer-like temperatures is happening earlier for most of these cities.

High Streamflow is Increasing, Raising Flood Risks

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High Streamflow is Increasing, Raising Flood Risks

The frequency of high streamflows has risen over the past 30 years in the Northeast, Ohio Valley, and the Mississippi Valley.