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Sinking Cities: Why Parts of Phoenix—and Much of Urban America—Are Slowly Dropping

A new study confirms Phoenix and 27 other U.S. cities are sinking—putting millions of people and buildings at long-term risk.

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Phoenix is sinking. Not metaphorically, but literally. According to a 2025 study published in Nature Cities, Arizona’s capital is subsiding at an average rate of 0.8 millimeters per year, with some areas dropping by up to 2 centimeters annually. While that might sound minor, the implications are anything but.

The study, which analyzed satellite data across 28 major U.S. cities, revealed a troubling trend: every single city examined is experiencing some form of land subsidence. And the causes are largely human-driven.

📉 What’s Happening Beneath Phoenix?

The ground beneath Phoenix is slowly compacting due to a combination of natural and human-induced factors. Chief among them is groundwater depletion. Over the past century, large-scale pumping of underground aquifers caused the soil above to compress. While Arizona implemented the Groundwater Management Act in 1980, and water use has since stabilized, the lingering impact of past overuse remains.

Some areas in the Phoenix metro region have already experienced up to 18 feet of subsidence over the last 40 years, and the newly published data shows that areas housing 1.4 million people and 113,000 buildings remain at moderate to high risk of structural damage.

🌆 Sinking Cities Across the U.S.

Phoenix isn’t alone. The Nature Cities study revealed that nearly 34 million Americans live on land that is subsiding, and over 29,000 buildings nationwide sit in zones of high or very high risk.

Here are some key findings from other cities:

Houston, TX is the most affected, with 42% of its area sinking more than 5mm/year and localized zones dropping up to 5 cm annually. Dallas–Fort Worth, New York City, Chicago, Los Angeles, and Denver are also seeing significant ground shifts. Even cities you might not expect—Portland, Boston, and Philadelphia—are experiencing measurable sinking, largely due to natural geologic changes or compaction from development on soft soils.

🛠️ What Causes Subsidence?

There’s no single cause, but several primary drivers are contributing:

Groundwater Overuse: This is the dominant factor in most regions, especially in arid and agricultural areas. Oil and Gas Extraction: Particularly in Texas, removing underground fossil fuels causes the surface to sink. Post-Ice Age Rebound Effects: In northern cities like Chicago and New York, the land is still adjusting from glacial movement thousands of years ago. Urbanization: The weight of skyscrapers, concrete, and infrastructure can compress soft soils underneath. Landfill & Soil Compaction: Areas built on old lakes, wetlands, or landfills—common in coastal cities—are inherently less stable.

⚠️ What’s at Risk?

The consequences of even slow land subsidence can be serious:

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Building damage: Foundations can crack, tilt, or become unstable. Infrastructure stress: Roads, pipelines, and electrical lines can be misaligned or fractured. Flood risk: As land sinks, especially in coastal cities, the risk of storm surge and sea-level rise intensifies. Water infrastructure: Subsidence can affect aquifer storage and groundwater recharge.

✅ What Can Be Done?

While stopping subsidence entirely is nearly impossible, smart urban planning and resource management can mitigate the damage:

Limiting groundwater use through stricter regulation and conservation. Investing in resilient infrastructure designed to adapt to ground shifts. Monitoring subsidence hotspots with regular satellite data. Educating the public and developers on long-term land risks before building.

🧭 Final Thoughts

Phoenix’s slow descent is a reminder that cities are not static—they live, breathe, and shift over time. As climate change and population pressures increase, the invisible motion beneath our feet demands more attention. Cities that plan for it now will stand taller in the decades to come—even if the ground beneath them doesn’t.

Related Articles:

Yes, Phoenix Is Sinking. What Does That Mean for the City? – Phoenix New Times

Cities Are Sinking Across the U.S. – CBS News

Why Houston and New York Are Sinking Fast – Business Insider

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    Rod: A creative force, blending words, images, and flavors. Blogger, writer, filmmaker, and photographer. Cooking enthusiast with a sci-fi vision. Passionate about his upcoming series and dedicated to TNC Network. Partnered with Rebecca Washington for a shared journey of love and art.

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National 211 hotline calls for food assistance quadrupled in a matter of days, a magnitude typically seen during disasters

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National 211 hotline calls for food assistance quadrupled in a matter of days, a magnitude typically seen during disasters
Sharp spikes in calls for food assistance are rare outside of natural disasters. AP Photo/Eric Gay

National 211 hotline calls for food assistance quadrupled in a matter of days, a magnitude typically seen during disasters

Matthew W. Kreuter, Washington University in St. Louis and Rachel Garg, Washington University in St. Louis Between January and mid-October 2025, calls to local 211 helplines from people seeking food pantries in their community held steady at nearly 1,000 calls per day. But as the government shutdown entered its fourth week in late October, states began to warn residents that Supplemental Nutrition Assistance Program benefits, sometimes known as food stamps, would likely be affected. Nearly 42 million Americans receive SNAP benefits each month. Over the next several days, calls to 211 from people seeking food pantries doubled to over 2,200 per day. Then on Oct. 26, the Trump administration announced that SNAP benefits would not be arriving as scheduled in November. The next day, food pantry calls skyrocketed to 3,324. The following day, calls reached 3,870. By Wednesday, it was 4,214. We are public health scientists specializing in health communication and unmet social needs. We and our colleagues have been working closely with the 211 network of helplines across the U.S. for 18 years. Excluding disasters, sudden surges of this magnitude in requests for food or any other need are rare at 211s, and can signal both public worry and need, as happened in the first weeks of the COVID-19 pandemic.

What is 211?

Like 911 for emergencies, 211 is a national three-digit dialing code, launched in 2000, that connects callers to information specialists at the nearest local 211 helpline. Those specialists listen to callers’ needs and provide them with referrals to health and social service providers near them that may be able to help. Every call to 211 is classified by the need of the caller, such as shelter, rent, utilities or food – each of which has its own code. Callers are disproportionately women, most of whom have children or teens living in their homes. Most don’t make enough money to make ends meet. They call 211 seeking help paying rent or utility bills, getting food to feed their family, or securing household necessities like a winter coat for a child, or a mattress. The hotline does not solve these problems for callers, but 211 information specialists use the most current local information available to refer callers to service agencies that are most likely to have resources to help. The 211 network is the closest thing the U.S. has to a real-time surveillance system of the needs of low-income Americans. There are roughly 200 state and local 211s in the U.S., and on an average day they will collectively field between 35,000 and 40,000 requests for help. Each request is coded using a taxonomy of over 10,000 need types, is time- and date-stamped, and is linked to the caller’s ZIP code. In addition to phone calls received by their helplines, 211s increasingly track requests they receive online, through their websites. The national network of 211s covers all 50 states and 99% of the U.S. population. It’s encouraging to us that with each passing year of giving talks and lectures about 211, more and more audience members raise their hands when asked if they’ve ever heard of 211. But it’s far from 100%. If you are one of those with your hand down, here’s what you need to know.
Food banks around the country are having trouble keeping their shelves stocked.

Gaining local insights

Our team aims to deploy the latest methods from data science, predictive analytics and artificial intelligence to detect trends in critical needs sooner and at a more localized level, increasing the speed and efficiency of getting needed help to local community members. Our research has described the needs of callers who reach out to 211, community capacity to respond to callers’ needs, the ability of 211 to detect rapid changes in community needs, and the benefits of integrating health referrals into 211s. When we saw food requests rising sharply in late October, we reached out to local leaders at 211 call centers to get insights into what they were hearing from callers. Robin Pokojski, vice president of 211 and community partnerships at United Way of Greater St. Louis, reported that with all the uncertainty around SNAP benefits, callers were initially “anticipating” a need for food pantries. Tiffany Olson, who directs essential services at Crisis Connections and its 211 call center in Washington state, shared that even callers who rely heavily on their SNAP benefits sometimes need to use food banks as a supplement. Those callers know that pivoting to rely solely on food banks probably won’t be enough to meet their food needs in full. They realize that food pantries and food banks will be more heavily burdened if SNAP benefits are unavailable.

Increasing the impact of 211 data

The trove of daily data on the needs of U.S. callers to 211 at the ZIP code level is unparalleled. Yet for years it was virtually invisible to anyone who didn’t work at a 211 hotline. Even for people who work and volunteer within the 211 system, formal reporting on caller needs within a community was minimal, such as a one-page annual summary. That changed in 2013. Working with 211s across the country, our team created 211 Counts, a collection of user-friendly, public-facing data dashboards for local 211s across the U.S. The dashboards allow users to explore the top needs in their community, see which neighborhoods are affected most and understand how needs are changing over time. The data can be sorted by legislative districts, school districts and counties to make the findings more relevant to different audiences. Data on 211 requests are updated each night. Now in its 12th year, 211 Counts includes data on over 90 million requests from 211 callers in all or parts of 44 states. The local dashboards have been visited millions of times.

211 as an early-warning system

This is not the first time data collected through 211 hotlines has detected early signs of trouble for some Americans. Just weeks ago, we found that calls from people seeking assistance making car payments have been increasing steadily for five months, with daily calls peaking in October, at nearly twice the rate of May 2025. Before that, 211s were months ahead of news reporting in seeing public distress associated with the 2022 baby formula shortage, the 2016 Flint water crisis and the 2007 subprime mortgage crisis. When requests for major needs like food increase three- to fourfold overnight, every local 211 is likely to register this abrupt change. But when less frequent needs, such as car payment assistance, creep up slowly, with an extra call here and there over several months, it’s unlikely that any local 211 hotline would notice. That’s when the advantages of big data are greatest. By combining caller needs from 211s across the country, patterns emerge that would otherwise be missed. New data science tools are rapidly improving the speed and accuracy of detecting slight changes. When community and national leaders are made aware of potential rising threats, those threats can be tracked more closely and responses prepared. It’s easy to lose sight of the fact that each data point is a hungry child or a worried parent. Hotlines and food banks and food pantries need support in this moment to feed people. But most local safety net systems struggle to meet their community’s needs all the time. Data that documents the magnitude of need won’t fix the scarcity of local assistance, but it can help guide communities in allocating limited resources. Matthew W. Kreuter, Kahn Family Professor of Public Health, Washington University in St. Louis and Rachel Garg, Assistant Professor of Public Health, Washington University in St. Louis This article is republished from The Conversation under a Creative Commons license. Read the original article.

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Urbanism

Celebrating World Urbanism Day: Building Livable Communities

World Urbanism Day: Celebrating livable communities and the role of urban planning. #WorldUrbanismDay Celebrating World Urbanism Day

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Last Updated on November 7, 2025 by Rod Washington

apartment buildings along the riverbanks. Celebrating World Urbanism Day
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Celebrating World Urbanism Day

On November 8th, we commemorate World Urbanism Day, a moment to acknowledge and advocate for the significance of urban planning in shaping livable communities. Also known as World Town Planning Day, this occasion highlights the interaction between inhabitants and their built environments in urban areas.

Urban planning focuses on creating healthy and vibrant communities that offer a high quality of life. By ensuring orderly development and preserving the economy and environment, planners strive to enhance the well-being of residents. The key elements of a livable city include plentiful opportunities for a high quality of life, diverse housing options, accessible public transportation, ample green spaces, and essential amenities like schools, grocery stores, and recreational facilities.

Cities such as Osaka, Tokyo, and Zurich exemplify healthy and livable communities, while Tripoli, Algiers, and Lagos face challenges in this regard. It is essential for us to engage in urban planning discussions, attend local council meetings, and explore ways to improve our communities. Let’s celebrate World Urbanism Day by spreading awareness, connecting with public health networks, and championing the creation of livable cities through #WorldUrbanismDay.

Check out our articles about urbanism: https://stmdailynews.com/category/the-bridge/urbanism/

10 Best Universities for Urbanism In North America: Colleges With Great Transit, Walking and Biking

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  • Rod Washington

    Rod: A creative force, blending words, images, and flavors. Blogger, writer, filmmaker, and photographer. Cooking enthusiast with a sci-fi vision. Passionate about his upcoming series and dedicated to TNC Network. Partnered with Rebecca Washington for a shared journey of love and art.

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Daily News

Daylight Saving Time Ends: Reflecting on Seasonal Changes

As daylight saving time comes to an end on November 5, 2023, we reflect on the seasonal changes and the impact on our daily routines.

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Last Updated on November 4, 2025 by Daily News Staff

round silver colored chronograph watch. Daylight savings.
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Daylight saving time, a seasonal practice observed by most of the United States, ended on November 2, 2025. This practice involves setting the clock forward by one hour in the spring and then setting it back in the fall, aiming to optimize daylight usage. While the majority of states participate, exceptions include Arizona (except for the Navajo Nation) and Hawaii, along with several overseas territories.

The Uniform Time Act of 1966 established daylight saving time as a system used across the US. It begins on the second Sunday in March and concludes on the first Sunday in November, with time changes occurring at 2:00 a.m. local time. A helpful mnemonic reminds us to “spring forward, fall back,” indicating the clock moves forward an hour in spring and back an hour in fall.

In 2022, the Sunshine Protection Act was passed by the United States Senate, aiming to make daylight saving time permanent. However, it did not receive approval from the U.S. House of Representatives.

As we bid farewell to daylight saving time for this year, let’s reflect on its impact on our daily routines and the changing of the seasons.

Here is some additional information about daylight saving time: https://en.wikipedia.org/wiki/Daylight_saving_time_in_the_United_States


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