What are the top 5 cities for heat waves this summer?
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While it may be impossible to pick the 5 worst heat waves of 2009 on a city-by-city basis, doing so on a regional basis is less problematic, mainly because the number of candidates is reduced by 2 or 3 orders of magnitude. Cities in these areas can then be used as examples, although microclimatic factors can create large temperature differences over relatively short distances.
For prolonged, widespread, record-breaking heat, the top two heat waves of 2009 have been in southeast Australia and northwestern North America, in that order. Multiple all-time records were broken in each case; major cities include Melbourne and Seattle, respectively, but a "Top 5" list would be all-Australian.
http://www.bom.gov.au/climate/current/statements/scs17c.pdf
http://www.climate.washington.edu/newsletter/2009Aug.pdf
Other significant heat waves have occurred in southeast Europe (example: Sofia, Bulgaria) and the south-central US (St. Louis, San Antonio).
http://sofiaecho.com/2009/07/23/760298_phew-what-a-scorcher-bulgarias-emergency-situations-ministry-issues-heatwave-warning
http://www.usatoday.com/weather/news/2009-06-21-southern-heat_N.htm
http://74.125.155.132/search?q=cache:koqnopLxU88J:www.crh.noaa.gov/lsx/%3Fn%3D06_18_27_09+2009+heat+wave+southern+us&cd=7&hl=en&ct=clnk&gl=us&client=firefox-a
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Dallas Tx, Phoenix AZ, Sacramento CA , Austin TX, Saint Louis MO , are average number of days per summer with most heat waves.
Global warming will bring more extreme heat waves. As the United States
warms another 4 to 11°F on average over the next century, we will have
more extremely hot summer days. Every part of the country will be
affected. Urban areas will feel the heat more acutely because asphalt,
concrete, and other structures absorb and reradiate heat, causing
temperature to be as much as 10°F higher than nearby rural areas.
Global warming will mean that nearly every city in the United States
will be affected by more extreme heat. Yet, differing climatic, demographic,
and socioeconomic conditions will mean that some locations at more risk
than others.
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