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Tag: heat

Global warming increases risk of heat stress for outdoor workers

Global warming increases risk of heat stress for outdoor workers

Science
Oct. 8 (UPI) -- Every year, a few hundred people in the United States die as a result of heat exposure, making heat stress the leading cause of weather-related deaths -- deadlier than lightning, tornadoes, hurricanes and floods. Outdoor workers are especially vulnerable to heat, and their risk of exposure to heat stress conditions is likely to increase as the effects of climate change progress. That's why several advocacy groups, including Public Citizen and the United Farm Workers, have petitioned the federal government to establish stronger -- and specific -- heat stress-related protections for outdoor workers. Heat stress conditions are produced by the combination of high temperatures and high humidity. When it's humid, sweat can't evaporate efficiently, limiting the body's natural abi...
'Urban island' heat tests Phoenix, other large cities

'Urban island' heat tests Phoenix, other large cities

Technology
When temperatures soar as they have this week in downtown Phoenix, homeless people ride the air-conditioned light rail to avoid a heat so brutal it killed 155 people in the city and surrounding areas last year. An occasional siren wails as paramedics rush to help people sick from the heat. Already devilishly hot for being in the Sonoran desert, Arizona's largest city is also an "urban heat island," a phenomenon that pushes up temperatures in areas covered in heat-retaining asphalt and concrete. Phoenix on Wednesday recorded a sweltering 116 degrees (46 Celsius), setting a new high for the date. Phoenix officials say they are tackling urban warming, monitoring downtown temperatures, planting thousands of trees and capturing rainwater to cool off public spaces. Elsewhere, Chicago maintains...
Engineers install heat shield on NASA's Parker Probe

Engineers install heat shield on NASA's Parker Probe

Science
July 6 (UPI) -- For the first time in months, the Parker Solar probe is fully integrated. Engineers have reinstalled the spacecraft's next-generation heat shield, NASA announced this week. For NASA's Parker Solar Probe, a spacecraft tasked with studying the sun, protection from extreme heat is obviously essential. The Thermal Protection System will provide that essential shielding. The protective layer was installed last fall but was removed shortly afterwards. In the months since, the shield and spacecraft have been subjected to a series of intensive tests. On its mission to study the sun's corona, the probe will fly within 4 million miles of the sun. The outside of the heat shield will reach 2,500 degrees Fahrenheit, but its insides, instruments included, will never get hotter than 85 ...
'Business as usual once heat gets turned up' – Gilchrist on Australia after ball-tampering

'Business as usual once heat gets turned up' – Gilchrist on Australia after ball-tampering

Sports
England v Australia 1st ODIVenue: Oval Date: Wednesday, 13 June Time: 13:00 BSTCoverage: Live Test Match Special radio and text commentary on every match on BBC Radio 5 live sports extra & BBC Sport website, plus desktop, tablets, mobiles and app.Australia face some "large hurdles" in getting over the ball-tampering scandal which "shocked and hurt" a nation but "it will be business as usual once the heat gets turned up", says Adam Gilchrist.The Baggy Greens return to international action for the first time since the controversy against South Africa in March when they start a five-match one-day series against England at The Oval on Wednesday, looking to rebuild their battered reputation.Captain Steve Smith a...
NASA engineers use gold to redirect excess heat from James Webb Telescope

NASA engineers use gold to redirect excess heat from James Webb Telescope

Science
June 5 (UPI) -- Engineers at NASA have found a way to redirect excess heat from the James Webb Telescope's most sensitive instruments. The telescope's four instruments are contained within the integrated science instrument module, or ISIM, which sits behind the array's main mirror. These sensitive instruments could be damaged or disrupted by excess heat, so scientists had to find a way to redirect thermal energy away from the ISIM. As detailed in a mission update published Tuesday by NASA, engineers are currently installing gold baffles that will channel thermal radiation away from the instruments and out into space. Gold also helps the telescope's mirrors direct infrared light toward the ISIM. "Gold has a very high reflectivity in the infrared spectrum range, so it is ideal for directin...