
Sustainable Switch Climate Focus: Storms hit China and Mexico
June 20 - This is an excerpt of the Sustainable Switch Climate Focus newsletter, where we make sense of companies and governments grappling with climate change on Fridays.
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Hello,
This week's Climate Focus takes a look at the storms that have wreaked havoc across China and Mexico.
Central and southern China were on high alert for more flash floods on Friday as the annual East Asia monsoon gathered pace and extreme rainfall threatened disruption in the world's second-largest economy.
Extreme rainfall and severe flooding, which meteorologists link to climate change, increasingly pose major challenges for policymakers. They threaten to overwhelm ageing flood defences, displace millions and wreak havoc on China's $2.8 trillion agricultural sector.
China's rainy season, which arrived earlier than usual this year in early June, is usually followed by intense heat that scorches any crops that survive waterlogged soil, depletes reservoirs and warps roads and other infrastructure.
Economic losses from natural disasters exceeded $10 billion last July, when the rainfall typically peaks.
Over in Mexico, Hurricane Erick weakened to a tropical storm after making landfall on the southern Pacific coast on Thursday, leaving flooded streets and damaged boats and buildings in Oaxaca as authorities warned of dangerous rains.
In coastal towns, residents began clearing debris. "There are many boats sunk here," fisherman Eduardo Gonzalez said in Puerto Escondido. "We're here to help our colleagues."
"Life-threatening flooding and mudslides are expected, especially in areas of steep terrain," the U.S. National Hurricane Center said, forecasting up to 8 inches (20 cm) of rain for Guerrero state with up to 4 inches for its neighboring Oaxaca and Michoacan states.
Mexico's environment ministry also had warned of waves of up to 10 meters (33 feet).
WHAT TO WATCH
- Saving the seas:Click here for a video on marine scientists working to restore underwater forests in Greece's northern Cyclades and click here for a Reuters story on scientists demanding action to protect environmentally important meadows of seagrass at Croatia's Dugi Otok island in the Adriatic Sea.
Do check out this Reuters story on the vital underwater forest in the cold seas off Chile's arid northern coast that scientists say are threatened by warming oceans and human pollution.
CLIMATE LENS
Water watch: Since 2014, India has lost 60.33 billion units of coal-power generation across the country - equivalent to 19 days of coal-power supply at June 2025 levels - because water shortages force plants to suspend generation, according to federal data. Click here for a Reuters analysis on India's coal power boom facing challenges with water supplies.
NUMBER OF THE WEEK
$10 billion
That's the amount raised in deals at a United Nations conference to protect the world's oceans – way below the estimated annual need – as investors seek clearer regulation on ocean management before committing funds. Between 2015 and 2019, only $10 billion was invested against the U.N. estimate of $175 billion in required annual funding.
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BBC News
2 hours ago
- BBC News
Flash floods: Londoners should prepare for heavy rain, mayor says
More than 50,000 basement properties are at increased risk of floods due to climate change, the Mayor of London Sir Sadiq Khan has capital has seen the impact of the climate emergency first-hand with soaring temperatures and flash floods in recent years. In July 2021, severe flooding left some Londoners temporarily homeless as thousands of properties were filled with storm water and sewage after more than a month's rain fell in two Hall is sending guidance on flash flooding to households in basement properties, with advice on how to prepare for and deal with a flash flood. The warning comes as temperatures in London are due to soar to as high as 34C in the coming from City Hall has found that flood risk could affect nearly half of London's hospitals, a quarter of railway stations and one in five latest Environment Agency data shows more than half a million London homes and businesses at high or medium flooding can happen when very heavy rain falls on hard surfaces, overwhelming drainage and sewers - it can happen quickly and without warning. City Hall said while the likelihood of flooding remained low for most basement properties, where it does occur the "damage and risk to life can be serious".London Fire Brigade assistant commissioner Pat Goulbourne said that climate change was "evolving the challenges fire and rescue services face". He added: "It is important to have the plans in place to ensure that London is more resilient to the extreme weather we are experiencing on an increasingly regular basis. "Heavy rain and urban flooding can cause significant damage to property and infrastructure; being prepared will help minimise this threat and is vital to the wellbeing of this city and all Londoners." A leaflet will be distributed to at-risk properties across London offering guidance to residents about how to prepare for and deal with a are being advised to sign up to receive weather warnings through the Met Office alert email, check drains in and around the home are clear, and ensure they are aware how to turn off water, gas and electricity supplies. In addition, they are advised to prepare a "flood kit" of important items in case they have to evacuate their homes, containing warm clothing, a phone charger, any vital medication and important documents, such as proof of leaflet also shares the steps to follow if a flood Williams, London Councils executive member for transport and environment, said: "The 2021 floods in London were devastating, and it's vital that residents across the city are aware of flood risks to help prevent such widespread disruption and loss in the future."


The Guardian
4 hours ago
- The Guardian
Week of sweltering US heat – is this the new normal in a warming world?
The list of climate-related disasters in the US was long last week as vast swathes of America sweated under a brutal heatwave. There was a 'mass-casualty event' of fainting high-schoolers in New Jersey as a K-pop concert was cut short in Washington. Young hikers had to be rescued in New Hampshire as tarmac roads bucked and melted in South Dakota and Nebraska. Luckless Amtrak passengers were stuck on a train with no air conditioning in a Baltimore tunnel, while some subway services in New York were suspended. The Trump administration declared a power emergency in the US south-east, and in Georgia the agriculture commissioner advised residents to make sure their animals had water and shade. 'Remember to take care of our friends also,' Tyler Harper said. These incidents – and many more – were the result of the highest temperatures across the northern and middle swath of the US at this early summer date in some cases since the late 19th century. Nearly 130 million people were under extreme heat warnings or heat advisories on Thursday, according to Noaa's Weather Prediction Center, with 282 locations breaking daily heat records this week, with another 121 equalling with previous highs, Noaa data showed. Daily heat records were set in at least 50 cities in the eastern US on Tuesday alone, according to the National Weather Service, with New York City recording its hottest day since 2012, according to Noaa. Climate scientists blamed a rapidly warming Arctic for the heat dome – a consequence that they say is the result of the 'stuck' weather patterns that come from a wavier polar jet stream, which can cause not just heatwaves but also heavy rainfall and floods. A new study, published in the scientific journal Proceedings of the National Academy of Sciences, said found that stalled atmospheric patterns have tripled over the last 70 years. The authors of the study claim that while climate models predict that these patterns would occur more frequently with climate change, their study is the first to demonstrate that it is already happening – and will likely intensify as the planet continues to warm. Climate Central's climate shift index estimates that high temperatures over the past few days were at least five times more likely to occur because of human-caused climate change. Climate Central scientist Zachary Labe told Politico that the early heatwave 'is a stark reminder that climate change is making these dangerous and oppressive heat waves far more likely, affecting millions of people'. 'One of easiest ways to see climate change's impact is in how it's increasing the chance these types of heatwaves will occur,' Labe told Bloomberg. 'By the middle of this century, these types of heat waves will be normal. The extremes will be even higher.' According to the American Medical Association, elevated temperatures nearly 22,000 people died from heat in 14 years between 1999 and 2023. The National Weather Service statistics show heat claiming more lives than any other weather-related event. But heat events are only fatal in the extreme. A broader, general sense of oppression and discomfort was palpable in New York last week, when the extreme hear arrived after a cool spring and gave New Yorkers little time to acclimatize. 'We all know that prolonged heat exposure can have serious effects on your overall health, including mental health, but it can also negatively affect your skin,' said Kim Laudati, chief executive of IT Intelligent Treatment, a skin regeneration business in New York. Prolonged heat exposure due to the skin's moisture-barrier protective function becomes damaged, Lauditi said, leading to water loss within deeper and surface layers of skin, resulting in a state of dehydration. Chronic heat can lead to vasodilation and persistent redness. Inflammation ensues, which can also promote heat-induced erythema, or redness, to the point of creating telangiectasia; commonly known as 'spider veins' and melasma, a skin discoloration. There is also reduced concentration, irritability, and mood swings because the body is diverting resources to regulate body temperature; the impairment of melatonin production, leading to poor sleep. Heat-related damage to the blood-brain barrier can cause lack of focus, confusion, fainting and organ failure. 'With climate change already reshaping how we live, it's more important than ever that we educate ourselves,' Lauditi said. Climate change was on the minds of voters last week in New York's mayoral primary that culminated on the hottest day of heat-dome, when a thermometer at Belvedere Castle in Central Park registered 99 degrees for the first time since July 18, 2012. Democrat mayoral nominee Zohran Mamdani has said that the climate crisis is the central issue of out time and that it isn't separate from the crisis of capitalism, making it a co-traveler with his resonant message about the affordability of life, or lack of it, in the city. Zohran's climate platform is grounded in making the lives of working people better through climate action,' said Denae Ávila-Dickson with the Sunrise Movement, a climate group that endorsed Mamdani. 'He has an important commitment to transforming New York City into a national leader on climate.' 'It's clear to us that the climate crisis has been politicized, but it's not a political issue,' Ávila-Dickson added. 'It's affecting people in every city, in every state, and a lot of times we fee that it affects people in right in rural States, especially because they're not having those same kinds of resources.' In a typical year between 1979 and 2000, the average temperature in the northern hemisphere temperature would break the 21C (69.8F) barrier in July and continue for about five weeks, according to University of Maine's Climate Change Institute. But last year, the hottest on record, the northern hemisphere's average temperature held above 21C from 13 June until 5 September, and data from the Environmental Protection Agency shows that heatwaves have grown longer, more frequent and more intense over the past seven decades. 'If I was to compare this with what happened in the 20th century, it would be very unusual,' said Sonia Seneviratne, a Swiss climate scientist at the Institute for Atmospheric and Climate Science of the ETH Zurich, told the Washington Post.


BBC News
8 hours ago
- BBC News
UK heatwave: Why do our cities get so hot?
The temperatures we are experiencing as part of the current heatwave are expected to peak on Monday in the cities of London and may have noticed that temperatures are often much higher in urban areas than in the surrounding is because of something called the urban heat island helps to explain why built-up areas can be several degrees warmer than nearby rural places, during the day and leaves people living in cities more vulnerable to the impacts of climate change. What are urban heat islands? During heatwaves, city centres are on average 4-6C (39-43F) warmer than surrounding areas according to the European Commission Joint Research Centre, extreme cases the difference can be as much as 10C (50F), especially in very calm weather with little wind to mix the air.A key reason for this contrast is the hard, dark-coloured surfaces, like buildings and roads, that dominate urban absorb the Sun's energy rather than reflecting it, meaning they store heat. This is then slowly released into the surrounding air leading to higher temperatures, especially at heat generated by air conditioning units, vehicles - and humans - adds to this even further. In the countryside trees, rivers and lakes provide natural cooling and a source of moisture. Some of the Sun's energy is used in evaporating this moisture which leaves less to heat the land and the air, limiting the temperature tend to have less vegetation and fewer water sources meaning the ground and the air heat up more phenomenon also helps to explain why the very hottest days tend to be after a long spell of dry weather. The less moisture there is to evaporate, the more energy remains to lift temperatures. Is climate change making things worse? Extreme heat can be very uncomfortable and also and heat stroke can occur when temperatures rise, and urban heat island effects can also help to trap pollution leading to poor air change does not cause urban heat islands but because cities tend to be hotter, they are likely to be worst-affected by rising global to the UN, 55% of the world's population live in urban areas. This is projected to increase to 68% by climate change makes heatwaves more frequent and more intense, it will be cities - and their growing populations - that bear the brunt of extreme heat and the significant impacts it can bring. Tackling urban heat Planners in some of the world's major cities are taking measures to mitigate and adapt to the building Singapore, authorities are incorporating open spaces, external around buildings and lighter colours on walls and roofs, as well as increasing the amount of greenery in the half of Singapore is now green space and more than half a million trees have been planted since 2020 - with an eventual target of one million trees by 2030. In Spain, Barcelona has a growing network of more than 400 free climate shelters, external where people can shelter from extreme summer heat as well as from winter offer a maximum temperature of 26C (79F) and must provide comfortable seating and free drinking cities including Paris, Buenos Aires and New York have introduced similar in Phoenix, Arizona, researchers have been trialling lighter-coloured roads and pavements in an attempt to reduce heat in the urban centre.