The Basics: How Hot Is It? Check the Heat Index
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Hot weather is on its way to New York. So how hot is too hot before you drop?
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Entro 2.100 livello mari +59 cm e temperature +4 gradi
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The country's hottest, coldest, driest, most humid, oh you get the idea.
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The planet isn't the only thing heating up because of climate change. Some renewable-energy stocks have been pretty hot, too.
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Southeastern Europe baked under soaring temperatures Friday, with nearly 30 deaths across the region blamed on the year's first major heat wave. Electricity supplies, particularly in Greece and Albania, were strained as air conditioning use spiked.Temperatures reached 104 degrees in Athens on Friday, with a top recorded temperature of 113 degrees on the island of Rhodes, according to state NET television.Romania was particularly hard hit. Nineteen people have died of heat-related causes in the past few days, including 14 in the capital, Bucharest, the country's Health Ministry said. Read more
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Extreme PlanetThough both rovers are exploring Mars well beyond their initial 90-day missions, electrical connections and moving parts are showing signs of temperature-related fatigue.&quot;Every day we have a huge thermal cycle,&quot; notes Jake Matijevic, chief of the rover engineering team. &quot;That causes the solder in electrical connections to expand and contract until it breaks.&quot;Seasonal ChangeDuring their exploration of Mars, the rovers have recorded temperatures ranging from midday highs of about 35 degrees C. (95 degrees F.) in spring and summer to nighttime lows of about minus 110 degrees C. (minus 166 degrees F.) in winter. Spirit has experienced greater swings in temperature because its location is farther from the martian equator, which puts it seasonally closer to or farther from the Sun than Opportunity.Three Years of DataRover engineer Dan Porter has been tracking temperatures recorded by 50 or so sensors on each of the rovers since shortly after they landed on Mars in January 2004. The results are not only of interest to scientists, they're a favorite of human audiences as well.&quot;People ask about this all the time,&quot; says New Mexico geologist Larry Crumpler, a member of the Mars rover science team who created the charts showing monthly average temperatures superimposed on panoramic-camera images from each of the rovers. &quot;These plots of daily temperature are destined to become an important part of all my public outreach talks.&quot;Cold vs. ColderJust as on Earth, temperatures on Mars are not uniform everywhere. Objects exposed to direct sunlight are apt to be warmer than those in the shade. Some objects retain heat better than others. A source of relative warmth on Mars is rocky terrain, because it retains heat better than sandy terrain.A solar panel is sort of like a &quot;warm wall in mid-winter,&quot; says Crumpler. Components beneath the solar panels, such as the hazard avoidance cameras, are closer in temperature to the martian air. Unlike Earth, Mars does not have a thick, atmospheric blanket to seal in warmth by night or minimize the Sun's heat by day.Wear and TearEngineers have traced stalls in a shoulder joint on Opportunity's robotic arm to a broken electrical wire. The shoulder motor has experienced greater temperature swings than other parts because of its location beside a heater that has been stuck in the &quot;on&quot; position since shortly after landing.Notes Matijevic, &quot;Our theory is that one of the wires in the electrical coil broke free and disabled the motor.&quot;Mechanical ProblemsExtremely cold temperatures have also caused mechanical problems. Recently, Opportunity's right front wheel began drawing excess electrical current, reminiscent of Spirit's right front wheel in 2004. The demand for more electrical current suggests that the wheel motor is working harder than usual. Engineers suspect that, like motor oil that can't handle freezing temperatures on Earth, gelid lubricant failed to flow properly and caused Spirit's right front wheel to fail.Adjusting ExpectationsRover drivers have compensated for Spirit's stuck wheel by driving on the other five wheels. They have compensated for Opportunity's stalled shoulder joint by unstowing it before going to sleep at night. This way, if the motor fails during the night, when temperatures are at their lowest, they would still have limited use of the arm by operating the remaining working joints. Each rover has lost a few temperature sensors as well, while dozens more continue operating.Time Will Tell
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One of the great mysteries for astronomers is why our Sun's surface is so much hotter than its core. The counterintuitive answer, according to a suite of solar observatories, hinges on the Sun's tangled magnetic field and deep, fiery waves...
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Cyprus braces for heatwave    NICOSIA, June 23 (Xinhua) -- A sweltering heatwave is to hit Cyprus as temperatures are expected to hit 40 degrees Celsius from Sunday in the capital Nicosia.
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SCORCHING summers, hotter than that of 2003, could become more common in Europe by the middle of this century. The risk has more than doubled because of human activity producing increasing greenhouse gases in the atmosphere.
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Heat waves in the 21st Century will be more intense, more frequent and longer, US experts say.
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A rise of 1 degree Celsius could be enough to trigger 'dangerous' warming, scientists warn.
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By Anonymous  ANCIENT TEMPERATURE DROP M
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By Ben Aguirre Jr  FREMONT -- For most people, cold weather and fire danger are terms not often linked.   But firefighters know not to be fooled by the weather or the holiday glee. This could be a tragic season for folks if they don't exercise certain safety measures, they warn.
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Get 'em while they're hot (and underbought).
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The Earth's rapid warming has pushed temperatures to their hottest level in nearly 12,000 years and within a hairbreadth of a million years, a study by the US space agency showed.
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Human activity has raised the risk of more heatwaves like last year's, which gave Europe probably its hottest summer since 1500, scientists said on Wednesday.
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The European Union's goal of keeping the global temperature rise to 2 degrees Centigrade is unlikely to be met, a leading climate researcher has warned.  Professor Martin Parry, who co-chairs the impacts working group of the Intergovernmental Panel on Climate Change (IPCC), said that millions, if not tens of millions, would be at increased risk to their lives from a rise above 2 degrees Centigrade (3.6 degrees Fahrenheit). Parts of Africa would see water shortages, as would Asian and South American zones fed by mountain glacier melt. Crop yields would decline across the tropics; Europe would see an increase in heat waves, he said.