1. World Meteorological Organization Provisional Statement on the Status of the Global Climate (WMO, 2011); available at http://www.wmo.int/pages/mediacentre/press_releases/gcs_2011_en.html .
2. National Oceanic and Atmospheric Administration July 2011 - Oppressive Heat Locally and Across the Nation (NOAA, 2011); available at http://www.erh.noaa.gov/iln/climo/summaries/julyheat_summary.php .
3. National Oceanic and Atmospheric Administration Preliminary Tornado Statistics Including Records Set in 2011 (NOAA, 2011); available at http://www.noaanews.noaa.gov/2011_tornado_information.html .
4. World Meteorological Organization Weather Extremes in a Changing Climate: Hindsight on Foresight (WMO, 2011).
5. World Meteorological Organization Current Extreme Weather Events (WMO, 2010); available at www.wmo.int/pages/mediacentre/news/extremeweathersequence_en.html .