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Study warns of longer extreme heat periods by century's end_我的网站
A | (ECNS) -- Hot days worldwide could experience around four additional hours of extreme heat by the end of the 21st century under a high-emissions scenario, according to a study led by Chinese researchers. Published in Nature Climate Change, the study found that traditional daily temperature indicators may overlook shorter periods of extreme heat, while hourly temperature analysis can provide a more detailed picture of heat exposure and associated risks. Researchers from Sun Yat-sen University and other institutions analyzed global hourly temperature data from 1981 to 2023, combining observational records with climate model projections to assess how extreme heat exposure could change in the future. The research team found that the duration of extreme heat increased by 62 hours per decade over the study period. Around 28% of extreme heat events occurred on days that would not have been classified as hot days based on conventional daily temperature indicators. Under a high-emissions scenario known as SSP5-8.5, the researchers projected that between 2070 and 2099, each hot day could experience around four additional hours of extreme heat compared with the 2001-2023 period. Days not classified as hot could also see increased periods of extreme heat. The study also found that low- and middle-income countries account for a disproportionately large share of both current and projected extreme heat exposure. Younger generations in low-income countries are expected to experience the greatest increase in lifetime exposure. Researchers said the findings could help improve heat-warning systems, strengthen assessments of health risks and support climate adaptation efforts. (By Helen Mo, intern Liu Shuangjing) 
。 Texas Governor Greg Abbott has authorized his state’s National Guard and the Department of Public Safety to detain migrants who illegally cross the border between ports of entry and return them to US-Mexican border entry points.,The federal government is normally responsible for enforcement of immigration; Governor Abbott stressed in an executive order announced on Thursday that while US President Joe Biden “refuses to do his job and enforce the immigration laws enacted by Congress, the State of Texas is once again stepping up and taking unprecedented action to protect Americans and secure” the US southern border.,The governor referred to the US Constitution, which he said stipulates that the country “shall protect each [State in this Union] against [a border] invasion.”,The announcement comes after former Trump administration official Ken Cuccinelli said he wanted Abbott to declare an invasion and enact a Title 42-style program, which envisages migrants being “repealed at the border” and automatically turned away.,Cuccinelli’s remarks followed US authorities saying in late June that at least 51 migrants had died after being trapped inside a sweltering tractor-trailer truck found abandoned in Texas. The deceased 39 men and 12 women were discovered on the outskirts of San Antonio, in what became one of the deadliest human trafficking tragedies in recent history.,At the time, Abbott pointed the finger at the “open border policy”, pursued by Biden, who in turn said that the incident “underscores the need to go after the multi-billion dollar criminal smuggling industry preying on migrants and leading to far too many innocent deaths.”,The Biden administration is grappling with increasing border arrivals as US Customs and Border Protection (CBP) data revealed in mid-June that that Border Patrol agents apprehended 239,416 illegal migrants on the US southern border in May, a new record high.,'Doing Nothing': Border Patrol Union Chief Rips Biden Migrant Policies for 'Benefiting Smugglers'2 April, 14:25 GMT,This year, the number of illegal migrants detained every month on the US’ southern border hit two record highs, in March and April, 222,339 and 235,478, respectively, according to CBP.,In a separate development in March, Biden told migrants not to come to US, insisting that there had been a surge in immigration "in the last two years", but that that the current rise "could be" worse.,Former US President Donald Trump, for his part, argued at the time that Biden had "eroded" the successful system that Trump had put in place, and that his policies "were working better than they have ever seen on the southern border.",The crisis on the US southern border began almost immediately after Biden took office in January 2021 and revoked Trump-era immigration policies, including the 45th president’s signature border wall and the “Remain in Mexico” program. Other measures, including promises to “restore and expand” the US asylum system, and to potentially provide a “path to citizenship” for more than 11 million undocumented immigrants already residing in the US, led to a further surge in entry attempts.。
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。 Texas Governor Greg Abbott has authorized his state’s National Guard and the Department of Public Safety to detain migrants who illegally cross the border between ports of entry and return them to US-Mexican border entry points.,The federal government is normally responsible for enforcement of immigration; Governor Abbott stressed in an executive order announced on Thursday that while US President Joe Biden “refuses to do his job and enforce the immigration laws enacted by Congress, the State of Texas is once again stepping up and taking unprecedented action to protect Americans and secure” the US southern border.,The governor referred to the US Constitution, which he said stipulates that the country “shall protect each [State in this Union] against [a border] invasion.”,The announcement comes after former Trump administration official Ken Cuccinelli said he wanted Abbott to declare an invasion and enact a Title 42-style program, which envisages migrants being “repealed at the border” and automatically turned away.,Cuccinelli’s remarks followed US authorities saying in late June that at least 51 migrants had died after being trapped inside a sweltering tractor-trailer truck found abandoned in Texas. The deceased 39 men and 12 women were discovered on the outskirts of San Antonio, in what became one of the deadliest human trafficking tragedies in recent history.,At the time, Abbott pointed the finger at the “open border policy”, pursued by Biden, who in turn said that the incident “underscores the need to go after the multi-billion dollar criminal smuggling industry preying on migrants and leading to far too many innocent deaths.”,The Biden administration is grappling with increasing border arrivals as US Customs and Border Protection (CBP) data revealed in mid-June that that Border Patrol agents apprehended 239,416 illegal migrants on the US southern border in May, a new record high.,'Doing Nothing': Border Patrol Union Chief Rips Biden Migrant Policies for 'Benefiting Smugglers'2 April, 14:25 GMT,This year, the number of illegal migrants detained every month on the US’ southern border hit two record highs, in March and April, 222,339 and 235,478, respectively, according to CBP.,In a separate development in March, Biden told migrants not to come to US, insisting that there had been a surge in immigration "in the last two years", but that that the current rise "could be" worse.,Former US President Donald Trump, for his part, argued at the time that Biden had "eroded" the successful system that Trump had put in place, and that his policies "were working better than they have ever seen on the southern border.",The crisis on the US southern border began almost immediately after Biden took office in January 2021 and revoked Trump-era immigration policies, including the 45th president’s signature border wall and the “Remain in Mexico” program. Other measures, including promises to “restore and expand” the US asylum system, and to potentially provide a “path to citizenship” for more than 11 million undocumented immigrants already residing in the US, led to a further surge in entry attempts.。