A second day of deadly tornadoes has seen 21 people die across the southern and central US, including one person in Elvis Presley's birthplace in Mississippi.
The city of Tupelo, home to 35,000 people, suffered power outages and extensive damage to homes and businesses.
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The 100 leaders did not agree on concrete proposals, but the meeting has raised hopes for concrete international agreement next December.
The speech was OK, passionate at times and certainly well received, but did not display the passion of past speeches.
The brother-in-law of a British hostage being held by Islamic State militants in Syria, says he is scared by US airstrikes in the country.