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Friday, August 15, 2025

As They Become More Common, Heat Waves Will Also Be More Destructive

Getting harder to find relief at the beach with high heat and bad air

By Colleen Cronin / ecoRI News staff

Summertime smog hanging over Ninigret
(photo by Will Collette)
Business closures, soaring visits to emergency rooms, and unhealthy air quality warnings are just some of what Rhode Island has to look forward to as heat waves hit more frequently and for longer periods.

Experts who recently spoke with ecoRI News warned about the risks the state will face going forward, as temperatures creep up and 100-degree days become more of the norm.

Historically a cool summer destination, Rhode Island hasn’t always needed to be ready for the consequences of extreme heat — but that time is coming to end as climate change ramps up.

Why and how is it getting warmer?

The fact Rhode Island is getting hit with more summertime heat waves, when average temperatures have crept up more slowly, isn’t necessarily intuitive, Brown University professor Stephen Porder said.

“Why does a 1-degree change in the average temperature mean all of a sudden you’re going to get so many more 100 degree days?” he asked. “It doesn’t sort of make sense, since the average temperature isn’t 99, right?”

But take a look at a shifting bell curve, and it starts to add up, he said.

As average temperatures start to shift even just a little bit higher, the frequency of more extreme high temperatures increases.

The same goes for warming winter temperatures, too, where an average creep of 1 or 2 degrees Fahrenheit transforms a state that used to be covered in snow all season long to one that only gets snow occasionally.

Real-world consequences

Kate Moretti, an emergency department doctor in Rhode Island and a public health researcher, has seen the effects of heat waves both live and in data.

“There is absolutely a relationship between extreme heat and [emergency department] visits,” she said. “We see a direct correlation between rising summer temperatures and increasing ED visits.”

During a week with 90-degree heat, emergency departments across Rhode Island will see about 380 more visits compared to a 70-degree week, she said.

“Which is significant when you have a system that’s already under strain,” she added. Hospitals and emergency departments in Rhode Island tend to be at capacity, “so we don’t have a lot of room or resources when there are huge surges in patients.”

When heat waves hit, some patients come in with health issues directly related to the high temperatures, such as heat exhaustion and heat stroke. Moretti has seen people come in with dangerously high body temperatures, often people who work outdoors and need to be rapidly cooled down once they get to the hospital.

But EDs also see higher incidents of other health issues during heat waves. Heart attacks, kidney problems, and strokes all increase, as well as mental health visits and traumatic injuries.

Some demographics are more vulnerable than others, including young children and older adults, and people who don’t have access to air conditioning, like those Rhode Islanders experiencing homelessness.

“On both ends of the spectrum, both extreme heat and extreme cold, we see negative health impacts,” Moretti said. “However, just the sheer number of increased harm and death is greater for extreme heat as compared to extreme cold.”

Air quality and accurate monitoring

When it’s hot outside, air quality tends to get worse, according to Brown University professor Meredith Hastings.

“Under hotter conditions we speed up reactions,” she said. “That can lead to the faster production of secondary pollution.”

People also might drive more to avoid being out in the heat and use their air conditioning, which may add more primary pollutants into the air.

“The more you throw into the soup, the more you stir it up,” Hastings said by way of comparison.

Heat waves also often come with less wind and stagnant air that lets pollutants sit around.

All these factors lead to worse air quality, especially in areas with specific conditions, something Hastings has been studying through her project Breathe Providence.

The project has installed air quality monitors throughout the city to gather focused readings in different places.

Average air quality is what gets reported and regulated, but, “We don’t breathe average air,” Hastings said.

For example, in the areas in and around the Port of Providence, there are more industrial businesses offloading pollutants and fewer green spaces and trees, which leads to temperatures that can be up to 10 degrees higher than the readings taken at T.F. Green International Airport in Warwick, where the National Weather Service records the official temperature for the city.

Proactivity and prevention

Even though temperatures are on the rise, there are still measures individuals and local governments can take to prevent harm.

Awareness can do a lot to keep people safe and bring ED visits down, Moretti said, whether that’s choosing not to run outside when it’s 95 degrees or hotter, or knowing that certain medications can make people more sensitive to hot temperatures.

“If they’re unable to access cooling through other means, there are places they can go to cool off,” she said.

The Rhode Island Emergency Management Agency runs cooling centers throughout the state during heat waves that people without reliable air conditioning can and should utilize.

“We need to look at this problem as a statewide problem, and be taking kind of direct action toward it, especially as heat waves continue to worsen across the state,” Moretti said.

She suggested more tracking of the direct and indirect health impacts of extreme heat, as well as the social and economic disruptions it causes. Hastings said she would also like to keep studying air quality issues on the hyperlocal level to help under sourced emergency management agencies know where to put their resources.

Declaring states of emergency during heat waves could also help keep people safe, as could improvements to building codes that either mandate air conditioning and/or use methods that naturally keep structures cool, according to Moretti.

“This is an under-recognized, very large problem that is going to require additional resources as we move forward, and this summer is probably the coolest summer we will have had,” she said. “I expect each summer moving forward with climate change to get progressively hotter.”

Paris could be an example to Providence to follow for what to do to prepare for these hotter summers, Porder said. It’s the city most vulnerable to heat in Europe, not because it’s the farthest south, but because of how densely built it is.

“It’s not just the air temperature,” he said. “It’s the built environment that really matters.”

Providence faces similar problems. While its wealthier neighborhoods have decent tree canopy cover, the lowest-income areas, such as the Port of Providence area, lack green space.

“In downtown Providence, another big issue is that we’ve covered huge amounts of space with parking lots,” he said, “which both encourages people to drive, which then makes the problem worse at the global scale, but also makes the local scale that much hotter.”

In Paris, to address higher temperatures, the city is tearing out parking lots and planting trees. It’s also opening up elementary school green spaces for the summer, so people have places to cool down.

“These are things that Providence could be doing as well,” Porder said. “We know what’s coming. There’s no excuse for not preparing for it.”