Technologies
Summer Sizzles On, With Triple-Digit Heat Waves Breaking Records
There’s less than two weeks of the season left, but major cities continue to bake.

Officially it’s nearly autumn, but oppressive heat continues to broil the low-lying deserts of California and Arizona. On Saturday, Phoenix set a new record as the city saw its 54th day this year with temperatures over 110 degrees Fahrenheit.
Temperatures had reportedly reached as high as 113 in the sprawling Phoenix metroplex by 4 p.m. on Saturday. The previous record of 53 days at over 110 degrees was set in 2020.
Earlier this summer, the city endured a 31-day streak of days over 110, shattering the previous record streak of 18 straight days.
Maricopa County, which includes Phoenix, is also on pace to reach a grimmer milestone: a record for annual heat-associated deaths. As of Wednesday the county counted 194 such fatalities in 2023 so far, with 351 more deaths under investigation to determine a link to the heat. At this point in 2022, there had been 153 confirmed deaths from the heat with 238 more still being investigated. Last year’s final tally of 425 heat-associated deaths is the most recorded in a calendar year since the county started keeping track in 2006.
More than half of the heat deaths so far in 2023 are among people who are either experiencing homelessness (44%) or have an unknown living situation (10%).
The City of Phoenix Parks and Recreation Department closes popular hiking trails from 9 a.m. to 5 p.m. on days when the National Weather Service issues an excessive heat warning. On Thursday, the agency put out just such a alert, saying that «a period of very hot temperatures, even by local standards, will occur.» Anyone wanting to take a walk at Phoenix’s iconic Camelback Mountain this weekend will have to hit it early in the morning or later in the evening.

Not just a single city’s problem
The danger expands beyond Phoenix’s concrete-laden metroplex, with Tucson, Yuma, Palm Springs and places in between also under an excessive heat warning this weekend.
Many heat records in the western US are typically competing with previous marks set in just the past decade or so. Climate change and increasing surface temperatures have accelerated drastically in the 21st century, triggering increased risk of heat waves, drought, wildfire and stronger storms.
Solar physicist Keith Strong noted on Twitter Thursday that record high temperatures around the globe are tripling record lows.
«In the last week the Earth has set 1,178 new daily record high temperatures compared to just 351 new record lows,» Strong said. «If the climate were in climate balance, these two numbers should be statistically equivalent, but they are not.»
RECORD HIGH TEMPERATURES OUTPACING RECORD LOWS 3:1 — In the last week the Earth has set 1178 new daily record high temperatures compared to just 351 new record lows. If the climate were in climate balance, these two numbers should be statistically equivalent but they are not.
— Keith Strong (@drkstrong) September 7, 2023
How to stay cool and survive
The National Weather Service urges anyone in a region facing excessive heat to stay hydrated, avoid daytime sun exposure, wear light, loose clothes and seek out air conditioning.
For more on what types of clothing can help you beat the heat, check out our detailed guide to keeping cool.
Forecasters warn that fans may not be enough to cope with temperatures over 110 degrees this weekend, but access to air conditioning isn’t guaranteed for everyone in the Southwest. Fortunately, we’ve compiled 10 ways to get by without AC when temperatures soar.
And if you do have to rely on a fan, the proper placement will be key to get the most out of it and stem the sweating.
Also, fluids without alcohol, sugar and caffeine are more hydrating, as is eating smaller meals more frequently.
Be sure to check in on friends, family, neighbors and pets to see how they’re coping.
Many communities will offer public cooling shelters, including in Phoenix and Arizona’s Heat Relief Network. Check with your local county or municipal government for other resources.
Finally, if you’re in a heat zone, take some time to know the difference between heat stroke and heat exhaustion. Heat stroke can be deadly, so check out our guide on the signs, causes and what to do in such a scenario.
Technologies
Tariffs Explained: Latest on Trump’s Shifting Import Tax Plan, and What It Means
Technologies
Apple, I’m (Sky) Blue About Your iPhone 17 Air Color
Commentary: The rumored new hue of the iPhone 17 Air is more sky blah than sky blue.

I can’t help but feel blue about the latest rumor that Apple’s forthcoming iPhone 17 Air will take flight in a subtle, light-hued color called sky blue.
Sky blue isn’t a new color for Apple. It’s the featured shade of the current M4 MacBook Air, a shimmer of cerulean so subtle as to almost be missed. It’s silver left too close to an aquarium; silver that secretly likes to think it’s blue but doesn’t want everyone else to notice.
Do Apple employees get to go outside and see a real blue sky? It’s actually vivid, you can check for yourself. Perhaps the muted sky blue color reflects a Bay Area late winter/early spring frequent layer of clouds like we typically see here in Seattle.
«Who cares?» you might find yourself saying. «Everyone gets a case anyway.» I hear you and everyone else who’s told me that. But design-focused Apple is as obsessive about colors as they are about making their devices thinner. And I wonder if their heads are in the clouds about which hues adorn their pro products.
Making the case for a caseless color iPhone
I’m more invested in this conversation than most — I’m one of those freaks who doesn’t wrap my phone in a case. I find cases bulky and superfluous, and I like to be able to see Apple’s design work. Also, true story, I’ve broken my iPhone screen only twice: First when it was in a «bumper» that Apple sent free in response to the iPhone 4 you’re-holding-it-wrong Antennagate fiasco, and second when trying to take long exposure starry night photos using what I didn’t realize was a broken tripod mount. My one-week-old iPhone 13 Pro slipped sideways and landed screen-first on a pointy rock. A case wouldn’t have saved it.
My current model is an iPhone 16 Pro in black titanium — which I know seems like avoiding color entirely — but previously I’ve gone for colors like blue titanium and deep purple. I wanted to like deep purple the most but it came across as, in the words of Patrick Holland in his iPhone 14 Pro review, «a drab shade of gray or like Grimace purple,» depending on the light.
Pros can be bold, too
Maybe the issue is too many soft blues. Since the iPhone Pro age began with the iPhone 11 Pro, we’ve seen variations like blue titanium (iPhone 15 Pro), sierra blue (iPhone 13 Pro) and pacific blue (iPhone 12 Pro).
Pacific blue is the boldest of the bunch, if by bold you mean dark enough to discern from silver, but it’s also close enough to that year’s graphite color that seeing blue depends on the surrounding lighting. By comparison, the blue (just «blue») color of the iPhone 12 was unmistakably bright blue.
In fact, the non-Pro lines have embraced vibrant colors. It’s as if Apple is equating «pro» with «sophisticated,» as in «A real pro would never brandish something this garish.» I see this in the camera world all the time: If it’s not all-black, it’s not a «serious» camera.
And yet I know lots of pros who are not sophisticated — proudly so. People choose colors to express themselves, so forcing that idea of professionalism through color feels needlessly restrictive. A bright pink iPhone 16 might make you smile every time you pick it up but then frown because it doesn’t have a telephoto camera.
Color is also important because it can sway a purchase decision. «I would buy a sky blue iPhone yesterday,» my colleague Gael Cooper texted after the first rumor popped online. When each new generation of iPhones arrive, less technically different than the one before, a color you fall in love with can push you into trading in your perfectly-capable model for a new one.
And lest you think Apple should just stick with black and white for its professional phones: Do you mean black, jet black, space black, midnight black, black titanium, graphite or space gray? At least the lighter end of the spectrum has stuck to just white, white titanium and silver over the years.
Apple never got ahead by being beige
I’m sure Apple has reams of studies and customer feedback that support which colors make it to production each year. Like I said, Apple’s designers are obsessive (in a good way). And I must remind myself that a sky blue iPhone 17 Air is a rumored color on a rumored product so all the usual caveats apply.
But we’re talking about Apple here. The scrappy startup that spent more than any other company on business cards at the time because each one included the old six-color Apple logo. The company that not only shaped the first iMac like a tipped-over gumdrop, that not only made the case partially see-through but then made that cover brilliant Bondi blue.
Embrace the iPhone colors, Apple.
If that makes you nervous, don’t worry: Most people will put a case on it anyway.
Technologies
Astronomers Say There’s an Increased Possibility of Life on This Distant Planet
Using the James Webb Space Telescope, astronomers are working to confirm potential evidence of life on a distant exoplanet dubbed K2-18b.

Astronomers are nearing a statistically significant finding that could confirm the potential signs of life detected on the distant exoplanet K2-18b are no accident.
The team of astronomers, led by the University of Cambridge, used data from the James Webb Space Telescope (which has only been in use since the end of 2021) to detect chemical traces of dimethyl sulfide (DMS) and/or dimethyl disulfide (DMDS), which they say can only be produced by life such as phytoplankton in the sea.
According to the university, «the results are the strongest evidence yet that life may exist on a planet outside our solar system.»
The findings were published this week in the Astrophysical Journal Letters and point to the possibility of an ocean on this planet’s surface, which scientists have been hoping to discover for years. In the abstract for the paper, the team says, «The possibility of hycean worlds, with planet-wide oceans and H2-rich atmospheres, significantly expands and accelerates the search for habitable environments elsewhere.»
Not everyone agrees, however, that what the team found proves there’s life on the exoplanet.
Science writer and OpenMind Magazine founder Corey S. Powell posted about the findings on Bluesky, writing, «The potential discovery of alien life is so enticing that it drags even reputable outlets into running naive or outright misleading stories.» He added, «Here we go again with planet K2-18b.Um….there’s strong evidence of non-biological sources of the molecule DMS.»
K2-18b is 124 light-years away and much larger than Earth (more than eight times our mass), but smaller than Neptune. The search for signs of even basic life on a planet like this increases the chances that there are more planets like Earth that may be inhabitable, with temperatures and atmospheres that could sustain human-like lifeforms. The team behind the paper hopes that more study with the James Webb Space Telescope will help confirm their initial findings.
More research to do on finding life on K2-18b
The exoplanet K2-18b is not the only place where scientists are exploring the possibility of life, and this research is still an early step in the process, said Christopher Glein, a geochemist, planetary researcher and lead scientist at San Antonio’s Southwest Research Institute. Excitement over the significance of the research, he said, should be tempered.
«We need to be careful here,» Glein said. «It appears that there is something in the data that can’t be explained, and DMS/DMDS can provide an explanation. But this detection is stretching the limits of JWST’s capabilities.»
Glein added, «Further work is needed to test whether these molecules are actually present. We also need complementary research assessing the abiotic background on K2-18b and similar planets. That is, the chemistry that can occur in the absence of life in this potentially exotic environment. We might be seeing evidence of some cool chemistry rather than life.»
The TRAPPIST-1 planets, he said, are being researched as potentially habitable, as is LHS 1140b, which he said «is another astrobiologically significant exoplanet, which might be a massive ocean world.»
As for K2-18b, Glein said many more tests need to be performed before there’s consensus on life existing on it.
«Finding evidence of life is like prosecuting a case in the courtroom,» Glein said. «Multiple independent lines of evidence are needed to convince the jury, in this case the worldwide scientific community.» He added, «If this finding holds up, then that’s Step 1.»
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