Projected change in population density in Ethiopia by 2050 under a pessimistic climate change scenario. As climate change worsens even moderately, it could cause water shortages in Ethiopia severe enough to prompt 1.5 million Ethiopians to migrate by 2050. They’ll most likely move out of the northern highlands and Addis Ababa into the southern highlands and Ahmar Mountains. Addis Ababa lies at the center of Ethiopia’s agricultural region, and lower crop yields will result in movement out of the urban center, which is currently the hub of the country’s economic development. Graphic: The World Bank Groundswell Report

Get ready for tens of millions of climate refugees

By Susan Cosier 24 April 2019 (Technology Review) – In 2006, the British economist Nicholas Stern warned that one of the biggest dangers of climate change would be mass migration. “Climate-related shocks have sparked violent conflict in the past,” he wrote, “and conflict is a serious risk in areas such as West Africa, the Nile […]

Summer extremes of 2018 linked to stalled giant waves in jet stream

29 April 2019 (PIK) – Record breaking heatwaves and droughts in North America and Western Europe, torrential rainfalls and floods in South-East Europe and Japan – the summer of 2018 brought a series of extreme weather events that occurred almost simultaneously around the Northern Hemisphere in June and July. These extremes had something in common, […]

Air conditioning use emerges as one of the key drivers of global electricity-demand growth

15 May 2018 (IEA) – The growing use of air conditioners in homes and offices around the world will be one of the top drivers of global electricity demand over the next three decades, according to new analysis by the International Energy Agency that stresses the urgent need for policy action to improve cooling efficiency. […]

North China Plain could face killer heat due to global warming – “This is just going to be the hottest spot for deadly heat waves in the future”

By David L. Chandler 31 July 2018 (MIT News) – A region that holds one of the biggest concentrations of people on Earth could be pushing against the boundaries of habitability by the latter part of this century, a new study shows. Research has shown that beyond a certain threshold of temperature and humidity, a […]

(a) ERA-Interim wet bulb temperature (T) in India on 21 May 2016. (b) Monthly maximum of the wet bulb temperature in May 2016 (◦C). (c) Anomalies of the maximum wet bulb temperature in May 2016 (K), see text for details on the very high wet bulb temperatures in May 2016. (d–f) Same as (a–c) but for 22 May 2015. Graphic: Oldenborgh, et al., 2018 / Natural Hazards and Earth System Sciences

Graph of the Day: Wet bulb temperature in India during record heat wave, May 2016

24 January 2018 (Natural Hazards and Earth System Sciences) – On 19 May 2016 the afternoon temperature reached 51.0◦C in Phalodi in the northwest of India – a new record for the highest observed maximum temperature in India. The previous year, a widely reported very lethal heat wave occurred in the southeast, in Andhra Pradesh […]

Decadal mean changes of maximum near-surface air temperature (ΔTx) and wet-bulb temperature (ΔTW) for 30-year future periods in the Middle East and North Africa. The figure is generated using the results of the ensemble mean of 17 RCMs. Graphic: Ahmadalipour Moradkhani, 2018 / Environment International

Deadly heat waves in Middle East and North Africa to increase by 8–20 times if global warming isn’t slowed

By Ali Ahmadalipour and Hamid Moradkhani 12 May 2018 (Environment International) – Climate change will substantially exacerbate extreme temperature and heatwaves. The impacts will be more intense across the Middle East and North Africa (MENA), a region mostly characterized by hot and arid climate, already intolerable for human beings in many parts. In this study, daily […]

Raging wildfire north of downtown Los Angeles grows to one of the largest blazes in city history

By Ruben Vives, Andrea Castillo, and Alene Tchekmedyian 2 September 2017 (The Los Angeles Times) – A brush fire in the Verdugo Mountains north of downtown Los Angeles has burned more than 5,000 acres, making it one of the largest fires in the city’s history and one that officials warn could grow larger if erratic weather […]

Histograms of daily maximum wet-bulb temperature, TWmax (°C), and maps of the ensemble averaged 30-year TWmax. (A) The histograms are generated for the most populous cities in the selected regions for each scenario: HIST (blue), RCP4.5 (green), and RCP8.5 (red). Values within each panel correspond to the 2- and 25-year return period of the bias-corrected annual maxima of TWmax, and the x and y axes indicate TWmax (°C) and the number of occurrences on a logarithmic scale, respectively. The background image was obtained from NASA Visible Earth. (B to D) The spatial distributions of bias-corrected ensemble averaged 30-year TWmax for each GHG scenario: HIST (1976–2005) (B), RCP4.5 (2071–2100) (C), and RCP8.5 (2071–2100) (D). Graphic: Im, et al., 2017 / Science Advances

Climate change to cause humid heatwaves that will kill even healthy people

By Damian Carrington 2 August 2017 (The Guardian) – Extreme heatwaves that kill even healthy people within hours will strike parts of the Indian subcontinent unless global carbon emissions are cut sharply and soon, according to new research. Even outside of these hotspots, three-quarters of the 1.7 billion population – particularly those farming in the Ganges […]

The world is about to install 700 million air conditioners – “Demand for cooling, particularly in hot climates, is going to be an incredible driver of electricity requirements”

By Chris Mooney and Brady Dennis 31 May 2016 (Washington Post) – As summer temperatures finally settle in, many in the United States take it for granted that they can dial down the thermostat: Americans use 5 percent of all of their electricity cooling homes and buildings. In many other countries, however — including countries […]

The deadly combination of heat and humidity

By Robert Kopp, Jonathan Buzan, and Matthew Huber 6 June 2015 (The New York Times) – The most deadly weather-related disasters aren’t necessarily caused by floods, droughts or hurricanes. They can be caused by heat waves, like the sweltering blanket that’s taken over 2,500 lives in India in recent weeks. Temperatures broke 118 degrees in parts […]

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