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New Orleans Formerly a ‘Hot Island.’ Then Ida Cut Power

Sunday, Hurricane Ida fell in Louisiana, to connect with 2020’s Hurricane Laura like the strongest hurricane ever to hit the country. Winds of up to 150 miles per hour (150 km / h) tore off electrical equipment, and left millions of powerless people. Eight lines to ship to New Orleans was cut.

Now the temperature is in the ’90s, and violent humidity – and summer – and more recently – have put Louisiana in trouble: Without electricity, people without a generator would also have no fans or fresh air. Entergy resources say power cannot be restored for three weeks, but local authorities are warning that this could be a month to others. “I’m not satisfied with 30 days, Entergy people are not satisfied with 30 days,” Louisiana governor John Bel Edwards He said at a press conference Tuesday. “No one who wants power is satisfied with this.”

The problem is particularly acute in New Orleans and other cities in the past. “tropical islands”In appearance. This is an area with insufficient trees or other green areas where the construction site absorbs solar energy during the day, and releases it slowly at night. Urban temperatures can heat 20 Fahrenheit more than the surrounding areas. Here is an additional article: An analysis published in July by the Climate Central research team found that the power of New Orleans Island is worse than any other city in the United States.

If you want to know how hell suffers the weather, here it is. “The whole area is already hot and humid in the summer,” said Barry Keim, a meteorologist at Louisiana State University. “And you throw it on some hot islands in the cities, which only aggravates it, and you demolish the air conditioning system. It’s a disaster.”

A number of factors are turning cities into tropical islands. Concrete, tar, and bricks absorb heat well. When the air is cooled at night, straight objects simply release their heat, so they can stay warm when the sun rises the next day and uses more energy. “That’s why you have cooked food after a few days in the heat,” says Portland State University scientist Vivek Shandas, who studied island heat in Portland, New Orleans, and many cities. Following Hurricane Ida, she says, it now looks like New Orleans is experiencing “a few days of extreme heat.”

The design of the built space is a big deal. Tall buildings absorb sunlight and block the wind, blocking out the heat in cities. And only homes emit heat – especially industrial – or emit hot air from AC components.

Compare this to a tree-lined rural area: When the sun heats up the forest or grassland, plants absorb the energy, but then they emit water vapor. In other words, the green environment “sweat” to cool the air, making the heat much easier.

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In a good country, every city can be full of trees to cool down. But in a big city like New Orleans, Shandas says, temperatures can vary, albeit slightly closed. Brick houses are used to heat up more than those made of wood, and the solid oil fields glow in the sun. But if the houses are within trees, and if you have green spaces like parks, all the greenery helps to cool the air.

In August last year, Shandas and other researchers recorded 75,000 temperatures from New Orleans. He found that the coldest temperature was around 88 degrees, while the highest temperatures rose to 102 degrees.




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