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¿Por qué las altas temperaturas pueden hacer que los aviones sean demasiado pesados para despegar?

Published Fri, 21 Feb 2025 21:10:45 GMT

(CNN) — El aumento de las temperaturas en nuestro planeta dificulta el despegue de los aviones en algunos aeropuertos, lo que supone un nuevo reto para la aviación civil. Y como las olas de calor son cada vez más frecuentes, el problema podría extenderse a más vuelos, obligando a las compañías aéreas a dejar a los pasajeros en tierra.“El reto básico al que se enfrenta cualquier avión al despegar es que los aviones son muy pesados y la gravedad quiere mantenerlos en tierra”, explica Paul Williams, profesor de Ciencias Atmosféricas de la Universidad de Reading (Reino Unido). “Para vencer a la gravedad, necesitan generar sustentación, es decir, que la atmósfera empuje al avión hacia arriba.“La sustentación depende de varios factores, pero uno de los más importantes es la temperatura del aire, y a medida que este se calienta se expande, por lo que se reduce el número de moléculas disponibles para empujar el avión hacia arriba”.Clima extremo: OMS advie...

El Partido Popular obtiene una victoria en España, pero su triunfo no es contundente

Published Fri, 21 Feb 2025 21:10:45 GMT

(CNN) — España parece destinada a tener duras negociaciones políticas después de las elecciones del domingo, cuando ningún partido ganó suficientes escaños parlamentarios para formar gobierno. Así las cosas, las perspectivas para la formación de coaliciones siguen siendo inciertas.Con más del 99% de los votos escrutados, el Partido Popular (PP), de centroderecha, ocupará el primer lugar con 136 escaños. Se prevé que el advenedizo partido de ultraderecha Vox, un posible socio de coalición del PP, gane 33 escaños.Mientras tanto, el gobernante Partido Socialista de centroizquierda del primer ministro Pedro Sánchez está en camino de ganar 122 escaños, con el movimiento Sumar, probables socios de coalición, con 31 escaños.Resultados elecciones generales de España 23J, en vivoPara gobernar, un partido o coalición debe lograr una mayoría funcional de 176 escaños en la legislatura de 350 escaños.El líder del PP, Alberto Núñez Feijóo, dijo que estaba “muy orgulloso” durante...

Motorcyclist dead after crash in Fort Collins

Published Fri, 21 Feb 2025 21:10:45 GMT

DENVER (KDVR) -- A motorcyclist is dead after a crash in an intersection in Fort Collins on Sunday afternoon.Fort Collins Police Department responded to the crash at approximately 12:33 p.m. and found a motorcycle rider with life-threatening injuries, according to a press release. 4 juveniles in custody after crash following armed robbery, chase The rider was taken to the hospital where he was pronounced dead.It happened at the intersection of Lemay Avenue and Commanche Drive. The investigation found that three motorcycles were riding southbound on Lemay Avenue when the driver of a Toyota Camry, headed northbound on the same street, turned left to go westbound on Commanche Drive, according to the press release.One of the southbound motorcycles crashed into the passenger side of the Camry, and that rider died.The factors that led up to the crash are still being investigated by the Fort Collins Police Collision Reconstruction and Scene Handling Team.In the meantime, Sgt. Mike Avrech...

Cheyenne Frontier Days offering lots of free attractions

Published Fri, 21 Feb 2025 21:10:45 GMT

CHEYENNE, Wyo. (KDVR) -- They say there is no such thing as a free lunch, but there is a free breakfast thanks to Cheyenne Frontier Days.A much-loved western tradition is kicking off this weekend, the 127th annual Cheyenne Frontier Days. Rodeos, concerts, all the attractions. But there are things you can do that will not cost you one red penny. Colorado farmers markets near you It's happening now through July 30 at the Cheyenne Frontier Days Arena, and the schedule is packed.Start your day off with a hearty pancake, coffee and ham breakfast at the Cheyenne Depot Plaza, for free. It actually started out as an emergency preparedness exercise in 1986 and it turned into a much-loved annual event attended by thousands.Once you get your fill, you can work it off by going to one of the Cheyenne Frontier Days parades.“A real western theme and focused on those horse-drawn carriages and it’s quite a sight,” said Mike Smith, chairman of the public relations committee at Cheyenne Frontier Day...

Denver weather: Hot start to the week ahead of thunderstorms

Published Fri, 21 Feb 2025 21:10:45 GMT

DENVER (KDVR) — Denver's weather will stay hot with a daily chance for afternoon thunderstorms through the workweek. Weather tonight: Clearing, warmOvernight, clouds and showers will clear out. Temperatures will stay about 5 degrees warmer than normal and drop to the mid-60s. Weather tomorrow: Sunny start, possible stormsMonday will start with plenty of sunshine. High temperatures will climb to the upper 90s followed by the chance for afternoon thunderstorms. Looking ahead: Staying warm, afternoon stormsMore hot weather is on the way for the rest of the week.Tuesday will look similar to Monday. As high temperatures climb to the upper 90s, clouds will build in by the afternoon followed by a few thunderstorms. The best chance for thunderstorms arrives on Wednesday afternoon. However, this will only slow down the heat a little. High temperatures will continue to reach the low to mid-90s ahead of afternoon thunderstorms at the end of the workweek and into the weekend.

Police investigating reported armed robbery aboard yacht on Miami River

Published Fri, 21 Feb 2025 21:10:45 GMT

Police are investigating a reported robbery aboard a yacht along the Miami River.7News cameras captured a heavy police presence and several City of Miami Police cruisers with their lights on parked in the area of Southwest North River Drive and Second Street, near The Wharf Miami, just after 10 p.m., Sunday.The owner of the yacht said they chartered the vessel earlier in the day, and between 13 and 17 people were on board.When it came time to bring the yacht back to its proper dock, the owner said, the people who chartered the yacht paid, but they later held the captain of the boat at gunpoint and demanded their money back.Thankfully, the boat’s owner said, no one was hurt, adding that another crew member had a cellphone and was able to text for help.While the yacht is currently docked near The Wharf, the venue has nothing to do with the incident.A 7News crew saw police officers going on and off the yacht, as they continue to investigate. At one point, they appeared to take on...

Excessive heat warning issued for Miami-Dade and Broward; heat advisory extended until Monday

Published Fri, 21 Feb 2025 21:10:45 GMT

A heat advisory that had been issued for parts of South Florida this weekend was upgraded to an excessive heat warning.The warning, issued by the National Weather Service on Sunday afternoon, was in effect for all of Miami-Dade and Broward counties through 8 p.m.7News cameras captured people out and about at Morningside Park in Miami.“I’m exhausted, drained. It’s hard to feel full of energy, and you don’t want to be out here for super long,” said a man.Some are still trying to grapple with the sweltering temperatures.“It’s too hot to even go in the pool. It’s hot,” said parkgoer D’Andra Rolack as she held a portable fan to her face.https://twitter.com/Jackson_Dill/status/1683211830712324098?s=20According to meteorologists, the excessive heat warning happens when the heat index reaches temperatures of 113 degrees Fahrenheit or higher for more than two hours.Back in Morningside, parkgoer D’Andra Rolack said s...

How the EU can enlarge

Published Fri, 21 Feb 2025 21:10:45 GMT

Nathalie Tocci is director of the Istituto Affari Internazionali and a part-time professor at the European University Institute. Her latest book, “A Green and Global Europe,” is out with Polity.The European Union doesn’t like to enlarge.Even in the best of times, enlargement leads to a dilution of power for existing members. And if it also means an economic cost, resistance grows further. On top of that, if there’s no compelling security reason for it, and candidates drag their feet on reforms, the process freezes once more.This has been the story of the Western Balkans and Turkey: Below EU-average economies, weak governance, imperfect democracies, unsolved conflicts and the politicization of enlargement — alongside the security guarantee provided by Turkey, Albania, North Macedonia and Montenegro’s NATO membership, as well as the alliance’s presence in Kosovo — have long hollowed out the drive for enlargement.Yet, Russia’s invasion of Ukraine and the possibility of the so-called “e...

Rishi Sunak’s Tory MPs want a summer of passion … from him

Published Fri, 21 Feb 2025 21:10:45 GMT

LONDON — Rishi Sunak’s hoping to take his first summer holiday in five years. He’s going to need it.The British prime minister — known for his punishing work ethic — heads into Westminster’s summer break with plenty to keep his mind on the day job.Last week saw his Conservative party, currently trailing in the national opinion polls, suffer two heavy by-election losses. And, while he managed to hang on to Boris Johnson’s old seat of Uxbridge, few believe it’s the sign of a big Tory resurgence.“They have at least got one straw to cling to,” Anthony Wells, head of research at YouGov, said of the Tories’ Uxbridge result. “Not a very good straw, but if you’re in a storm you cling to what you can.”As Conservative MPs flee Westminster and head back to their constituencies for an earful from voters, there’s a sense the prime minister needs to use his summer wisely and come back with a fired-up plan to save the party’s skin.“Incremental ...

State police assisting in search for missing paddleboarder on Martha’s Vineyard

Published Fri, 21 Feb 2025 21:10:45 GMT

State police are assisting in the search for a missing paddleboarder on Martha’s Vineyard on Sunday.The search is unfolding on Edgartown Great Pond.At 7:46 p.m, Martha’s Vineyard police and fire agencies responded to Great Pond in the vicinity of Turkeyland Cove for a call for a male paddleboarder who had gone into the water, appeared to briefly struggle to stay on the surface, and then submerged and did not resurface, police said.The paddleboarder is a 43-year-old man. Another paddleboarder was on the pond with him at the time and saw him go under the water. No additional information was immediately available.This is a developing news story; stay with 7NEWS on-air and online for the latest details.