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Last week Los Angeles broke a temperature record held for 131-years reaching 36.6°C (98°F).  Sydney people might laugh responding with, “It’s a good day for the beach,” but Los Angeles has an average daily temperature of 22°C (71°F), so this was an extremely hot day for them.

Los Angeles temperatures like this are expected to triple by 2050 & so the City has set a target of lowering the urban heat island effect by three degrees by 2035.  “According to CalEPA, LA has the worst urban heat island effect of any region in California.”

“Excessive heat is deadly. Heat stroke, heat exhaustion, difficulty breathing, cramping and general discomfort killed more people between 1979 and 2003 than hurricanes, lightning, tornadoes, floods and earthquakes combined, according to the Centers for Disease Control Prevention.”  See – http://bit.ly/2ucsUE9

Los Angeles is one of only two cities in the world who have a temperature reduction target to reduce their urban heat island effect.  The other is Melbourne.

Los Angeles plans to do the urban heat island effect by –

  • Gradually replacing roofs with reflective materials, called ‘cool roofs.’
  • Repave or repaint city streets with reflective paint.
  • Plant more trees & increase the urban forest canopy. However, they did not mention using green walls & green roofs.  Perhaps these are seen as more transient & risky compared to solid hard surfaces such as albedo paint & tiles.

It all seems elementary & doable, which offers real hope.

The city aims to install 10,000 cool roofs by the end of this year – 2017.

“Beginning in 2014, LA has had a “cool roofs” ordinance, which requires anyone building a new roof or replacing more than half of an existing roof to do so with reflective shingles.”  I wonder if the Inner West Council has any green requirements like these for any new developments or roof replacements.  The former Marrickville Council did not when The Revolution building in Marrickville was built around 2012.  At a public meeting about the building the architect said that there was no requirement to add green features, so he did not.

After a trial of painting one city street in May 2017, the City of LA has painted 7 other blocks & aim to paint a block in all 15 council districts by the end of the summer.  They obviously mean business.

In March 2016 the former Marrickville Council did a trial of solar reflecting road surface paint in Cecilia Street Marrickville.   I have no idea whether Council has released information regarding the results. See – http://bit.ly/1Pyexc7

The City of LA also has a cool pavement program, aiming to have the urban heat island effect lowered by shade from street trees.  So, less heat, better health, more beauty & more happiness.  That is excellent in my opinion.

The building on the left is a relatively new development on Unwins Bridge Road St Peters. Many in the community were upset at the DA stage because of the trees that were to be removed. The DA was approved and the building built. I passed by recently was pleasantly surprised to see 4 good sized trees had been planted in Dabur Lane as part of the development. These are not token shrubs for landscaping, which is what we often see in new developments. Once grown these trees will help provide shade & supply the beauty & other benefits that only trees can offer.

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