Torrential downpours sent muddy water racing through streets in Libya, Greece, Spain and Hong Kong in early September 2023, with thousands of deaths in the city of Derna, Libya. Zagora, Greece, saw a record 30 inches of rain, the equivalent of a year and a half of rain falling in 24 hours.

A few weeks earlier, monsoon rains triggered deadly landslides and flooding in the Himalayas that killed dozens of people in India.

After severe flooding on almost every continent this year, including mudslides and flooding in California in early 2023 and devastating floods in New York and Vermont in July, it can seem like extreme rainfall is becoming more common.

So, what role does global warming play in this? And importantly, what can we do to adapt to this new reality?

As a climate scientist with a background in civil engineering, I am interested in exploring the links between the science of climate change and extreme weather events on one hand and the impacts those events have on our daily lives on the other. Understanding the connections is crucial in order to develop sound strategies to adapt to climate change.

Thirstier atmosphere, more extreme precipitation

As temperatures rise, the warmer atmosphere can hold more water vapor. Evaporation of water from land and oceans also increases. That water has to eventually come back to land and oceans.

Simply, as the atmosphere absorbs more moisture, it dumps more precipitation during storms. Scientists expect about a 7% increase in precipitation intensity during extreme storms for every 1 degree Celsius (1.8 degrees Fahrenheit) of warming.

This increase in the amount of moisture that air can hold is what scientists call the Clausius Clapeyron relationship. But other factors, such as changes in wind patterns, storm tracks and how saturated the air is, also play a role in how intense the precipitation is.

Liquid vs. frozen: Rain matters most

One factor that determines the severity of floods is whether water falls as rain or snow. The almost instantaneous runoff from rain, as opposed to the slower release of water from melting snow, leads to more severe flooding, landslides and other hazards – particularly in mountain regions and areas downstream, where about a quarter of the global population lives.

A higher proportion of extreme rainfall rather than snow is believed to have been a key contributor to the devastating floods and landslides in the Himalayas in August 2023, though research is still underway to confirm that. Additionally, a 2019 examination of flood patterns across 410 watersheds in the Western U.S. found that the largest runoff peaks driven by rainfall were more than 2.5 times greater than those driven by snowmelt.

In a 2023 study in the journal Nature, my colleagues and I demonstrated that the intensity of extreme precipitation is increasing at a faster rate than the Clausius Clapeyron relationship would suggest – up to 15% per 1 C (1.8 F) of warming – in high-latitude and mountain regions such as the Himalayas, Alps and Rockies.

The reason for this amplified increase is that rising temperatures are shifting precipitation toward more rain and less snow in these regions. A larger proportion of this extreme precipitation is falling as rain.

In our study, we looked at the heaviest rains in the Northern Hemisphere since the 1950s and found that the increase in the intensity of extreme rainfall varied with altitude. Mountains in the American West, parts of the Appalachian Mountains, the Alps in Europe and the Himalayas and Hindu Kush mountains in Asia also showed strong effects. Furthermore, climate models suggest that most of these regions are likely to see a sevenfold-to-eightfold increase in the occurrence of extreme rainfall events by the end of the 21st century.

Flooding isn’t just a short-term problem

Deaths and damage to homes and cities capture the lion’s share of attention in the aftermath of floods, but increased flooding also has long-term effects on water supplies in reservoirs that are crucial for communities and agriculture in many regions.

For example, in the Western U.S., reservoirs are often kept as close to full capacity as possible during the spring snowmelt to provide water for the dry summer months. The mountains act as natural reservoirs, storing winter snowfall and then releasing the melted snow at a slow pace.

However, our recent findings suggest that with the world rapidly shifting toward a climate dominated by heavy downpours of rain – not snow – water resource managers will increasingly have to leave more room in their reservoirs to store large amounts of water in anticipation of disasters to minimize the risk of flooding downstream.

Preparing for a fiercer future

Global efforts to reduce greenhouse gas emissions have been increasing, but people still need to prepare for a fiercer climate. The destructive storms that hit the Mediterranean region in 2023 provide a cogent case for the importance of adaptation. They shattered records for extreme precipitation across many countries and caused extensive damage.

A main factor that contributed to the catastrophe in Libya was the bursting of aging dams that had managed water pouring down from mountainous terrain.

This underscores the importance of updating design codes so infrastructure and buildings are built to survive future downpours and flooding, and investing in new engineering solutions to improve resiliency and protect communities from extreme weather. It may also mean not building in regions with high future risks of flooding and landslides.

Mohammed Ombadi has received funding from Lawrence Berkeley National Laboratory to conduct the Nature study discussed in this article.

In a world facing environmental challenges unprecedented in human history, it’s no surprise that eco-anxiety – a pervasive worry about the current and future state of our planet – has become an increasingly prevalent mental health issue.

As people witness the devastating impacts of climate change, deforestation and loss of biodiversity, it’s only natural to feel overwhelmed and disheartened. I happen to live in Phoenix, Arizona, a “heat apocalypse” city with dwindling water supplies, so I have some skin in the game.

But amid doom-and-gloom predictions, there is hope. As a therapist and clinical social work professor, I have seen firsthand how paralyzing eco-anxiety can be, and I’m dedicated to finding solutions. Here are a few evidence-based tips to tackle your climate woes.

What is eco-anxiety?

Eco-anxiety is a broad term that encompasses dread about environmental issues like pollution and disposal of toxic waste, as well as climate-specific fears, such as increasing rates of extreme weather events and sea-level rise.

Common symptoms of eco-anxiety include worry about future generations, trouble sleeping or concentrating, feelings of frustration and a sense of helplessness. These feelings can range from mild and fleeting concerns to deep despair, panic attacks and obsessive-compulsive behaviors.

Sound like you or someone you know? There are a number of tools that can help people cope with these feelings, summed up with the acronym UPSTREAM.

Understanding and self-compassion

Be kind to yourself and know that you are not alone in these feelings.

Caring about the world you live in does not make you a “crazy” alarmist. In fact, growing numbers of people across the globe feel the same way, with two-thirds of Americans reporting being at least somewhat worried about climate change in recent polls.

It makes sense that people would feel nervous when basic needs like safety and shelter are threatened. Give yourself grace, because beating yourself up for these very valid feelings will only make you feel worse.

Participate in the solution

It can be hard to feel empowered when environmental harms are taking a toll on your mental health, but the escalating global crisis still demands urgent attention. Instead of burying your head in the sand, use that mental discomfort as a catalyst for action.

Individual efforts to reduce your carbon footprint matter. Joining larger movements has the potential for even move significant impacts, as well as the potential to buffer anxiety, research shows. Volunteer your own unique passions, talents and skills to advocate for systemic changes that will benefit the planet and humanity.

When you feel anxious, use that energy as fuel for the fight. Harnessing eco-anxiety in this way can reduce your sense of powerlessness.

Self-talk

The weight of the climate crisis is heavy enough as it is – don’t let your brain make you feel even worse.

When it comes to thinking about climate change, a realistic mindset puts us in a “just right” psychological Goldilocks zone. Don’t numb your psychic wounds, but also don’t over-catastrophize.

As a therapist, I often help clients identify and reframe unhelpful thinking patterns. For example, while it is true that there are many environmental problems to grapple with, there is also positive news, so don’t discount it. Recognize and celebrate victories big and small.

Trauma: Process it so you can heal

The climate crisis has been conceptualized as a collective trauma, and many individuals are struggling with eco-grief from climate impacts that have already happened. Processing past trauma from events like weather disasters is a crucial step in enhancing your ability to cope with new experiences.

Even people who have not yet experienced significant climate impacts directly may have signs of pre-traumatic stress, a clinical term for the distress experienced in anticipation of a high-stress situation. A licensed mental health professional can help you process these emotions.

Reduce isolation

It’s no secret that having a strong social support network is a key ingredient for happiness. Surrounding yourself with compassionate, like-minded friends is also key to sustained efforts in doing your part to make a difference.

Consider joining or starting a Climate Cafe or similar group to talk about climate concerns. Visit a 10-step climate grief meeting. Join a local environmental organization. Or simply call up a friend when you need a listening ear.

Ecotherapy

Get outdoors and enjoy nature.

Go for a quiet walk in the woods and observe nature all around you – it’s a Japanese practice for relaxation known as forest bathing. Spend time gardening. Exercise outdoors or otherwise spend time outdoors in a place that is relaxing and restorative for you.

Acts of self-care

Self-care is paramount when it comes to managing the emotional toll of eco-anxiety.

Engaging in self-care practices, such as getting adequate sleep, eating healthy and having fun, helps us maintain a sense of balance in the face of overwhelming environmental concerns.

Remember what they teach you on airplanes – you should always put on your own oxygen mask before helping other passengers. Likewise, when we come from a place of wellness, we are better equipped to handle the stresses of eco-anxiety and make a difference in this area.

Mindfulness

Because eco-grief is focused on the past and eco-anxiety is future-oriented, reconnecting to the present moment is a powerful way to combat both.

By cultivating mindfulness – a nonjudgmental awareness of the present moment – people can become more attuned to their thoughts, feelings and bodily sensations in response to eco-anxiety triggers. This heightened self-awareness helps people to acknowledge worries without becoming consumed by them.

Mindfulness practices, such as meditation and deep breathing, provide a calming and grounding effect, helping to reduce stress and alleviate feelings of helplessness. Moreover, mindfulness fosters a deeper connection to nature and an appreciation for the present moment, which can counteract the sense of despair associated with future environmental uncertainties.

In the face of eco-anxiety, these strategies can build resilience, reminding everyone that they have the power to shape a more sustainable and hopeful future.

Karen Magruder does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.

Humans have contended with dust storms for thousands of years, ever since early civilizations appeared in the Middle East and North Africa. But modern desert dust storms are different from their preindustrial counterparts.

Around the world, deserts now increasingly border built structures, including urban dwellings, manufacturing, transportation hubs, sewage treatment and landfills. As a result, desert dust lifts a growing load of airborne pollutants and transports these substances over long distances.

This is happening throughout the Global Dust Belt, an arid to semiarid region that stretches from western China through Central Asia, the Middle East and North Africa. Similar storms occur in the U.S. Southwest and central Australia.

To our thinking, modern desert dust storms have been overlooked as a public health crisis. Elevated exposure to these events is likely to contribute to rising respiratory and other diseases, including asthma and chronic obstructive pulmonary disease. We are environmental researchers whose work shows a need for better public health practices to protect people from dust storm pollutants.

Massive, fast-moving dust storms

To appreciate the scale of the threat, consider the Arabian Peninsula, where asthma rates have been the world’s highest for the past two decades.

In spring 2011, one of the most severe desert dust storms in recent decades swept across the Middle East at the peak of the dust storm season. Its plumes spread from the west coast of the Persian Gulf to the eastern shores of the Caspian Sea, covering northern Saudi Arabia, southern Iraq, Kuwait and western Iran. One quadrant of this large storm alone covered most of the Arabian Peninsula.

This storm reached vertically as high as 5.5 miles (9 kilometers) above the ground. Its wind speeds exceeded 45 mph (72 kilometers per hour) – higher than average wind speeds in the region. Dust particle concentrations peaked at 530,000 micrograms per cubic foot (15,000 micrograms per cubic meter), blocking sunlight for days.

One study found that a large proportion of individuals exposed to sandstorms had symptoms that included increased cough, runny nose, wheezing, acute asthmatic attack, eye irritation and redness, headache, sleep disturbance and psychological disturbances. Another study reported that increased dust storm exposure in western Iran led to increases in hospital admissions for chronic obstructive pulmonary disease and more deaths from respiratory causes.

Needed: A climate + health framework

Researchers study desert dust storms in a dozen different fields, each with its own terminology, expertise and body of knowledge. This work includes analyzing satellite images, creating simulation models for predicting dust particle transport, and identifying each dust storm’s particle content. So far, however, the health effects of desert dust storms and their changing particle content have gotten scant attention.

As we discussed in a recent review article, studies have found pollutants in dust storms that include bioreactive metals such as copper, chromium, nickel, lead and zinc, as well as pesticides, herbicides, radioactive particulates and aerosolized sewage. The extent to which desert dust storms transport a special class of pollution particles, those even smaller than one micron – or one millionth of a meter – is not yet clear.

This is the class of submicron pollutants, abbreviated as PM1.0, which includes degraded microplastics, metallic nanoparticles, diesel exhaust and fine particles from degraded tires. Of all particulate matter classes, submicron particles are the most harmful to human health because when once inhaled, they enter the bloodstream, affecting every organ in the body, and even crossing the blood-brain barrier.

Public health recommendations

We offer several practices here that we believe would help public health agencies successfully tackle the problem of polluted dust storms.

1: Identify particle content for each dust storm.

Existing technology now makes it possible to identify the types of particles being carried in any particular storm. Scientists can already conduct particle trajectory analysis to trace dust and pollutant particles back to their sources.

Knowing the particle content of dust storms can identify ways to make these storms less hazardous, whether capping sewage systems or securing waste at ports to prevent materials from being picked up by dust storms.

2: Archive samples from each desert dust storm.

One physical catalog for dust storm particles already exists at the 19th-century dust storm archive kept by the Natural History Museum at Humboldt University in Berlin. We see a need for a modern archive that collects digital data on particle types, particle trajectory analysis, spatial coordinates and meteorological data.

Keeping both physical samples and data from each dust storm would allow for a comparative understanding of how and why particle content is changing. This has been done to analyze particle content related to military activity in the Middle East.

3: Protect indoor and closed spaces from the smaller dust storm particles.

During a major dust storm, high-speed winds blow fine particles around windows and doors for days. The particles most likely to penetrate indoors include the smallest, most harmful submicron class.

Typically, a gray, fluffy residue appears inside buildings after a dust storm, but there is no data so far on the identity and size of these particles. Our concern is that submicron pollutant particles are highly concentrated in this residue.

For a safe cleanup, we recommend that people should avoid dry vacuuming, which lofts particles back into the air. Instead, it is better to remove residues with water and a wet mop. We also recommend wearing face masks indoors before, during and after dust storms, since particulate concentrations start to rise ahead of the main storm. In our view, people should treat dust storm residue inside built structures as hazardous material until studies show otherwise.

4: Educate biomedical and meteorological experts together.

The rising human-made content of desert dust storms, particularly fine and ultrafine submicron particles, is a neglected public health concern that we believe calls for combined medical and meteorological expertise.

By educating biomedical and meteorological experts jointly about dust storms, public health agencies would have more complete strategies for how to best protect people. It would be valuable to have teams of health and weather experts carry out joint analyses of dust storm exposure data, and then apply the best statistical methods to both civilian and military health records.

Climate change is making already-dry areas around the world more arid. As deserts increasingly adjoin cities, industry and transportation corridors, desert dust storms will increasingly mirror human activity on land. These storms are becoming flying waste dumps, and we believe a public health perspective will help produce more effective responses.

Fatin Samara has received funding from the American University of Sharjah and the Sharjah Research Academy.

Claire Williams Bridgwater does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.