Fireflies across the U.S. have seen a robust surge in growth this summer in part to a wetter weather pattern.

But those fiery little critters — which some call lightning bugs — might be in a steady decline.

“Insect populations are known to vary from year to year,” said Eric Berger, a freelance journalist for The Guardian. “A one-year increase is not enough to indicate that there has been a reversal in the downward trajectory of fireflies.”

Berger added that scientists do not have baseline data for firefly species and only recently started to monitor populations.

“A lot of what they're using is anecdotal evidence, but they have started to set up monitoring sites to inventory fireflies so that they can determine whether the population has increased or decreased,” he said.

Of the studies conducted so far, Berger says fireflies face a number of threats from extended periods of drought due to climate change, light pollution, habitat destruction and the use of pesticides.

To hear the full conversation, click play on the audio player above or subscribe to the Climate Cast podcast.

The smoky summer of 2025 has produced a near record number of air quality alerts for Minnesota.

Most of this summer smoke has drifted in from these massive Canadian wildfires where more than 16 million acres of forest has burned in Canada this year.

MPR News chief meteorologist Paul Huttner talked with Matthew Taraldsen, a meteorologist with the Minnesota Pollution Control Agency (MPCA), about poor air quality and reason behind the state’s smoke-filled summers.

The following has been lightly edited for clarity. Listen to the full conversation by clicking the player button above or subscribe to the Climate Cast podcast.

Yes, it definitely can. The areas that have been on fire have also been extremely dry, and so it likely isn’t enough to put out the fires, but it will definitely kind of dampen down the fire activity and limit the amount of smoke that the fires do emit.

We’ve had 19 alerts this year so far. Our current record is 53, so we’re not quite to record, but we’re above record pace. We’re higher than we were at 2023 at this point in the season. No matter how you cut it, it’s a very high-impact wildfire season.

The short answers is, it’s definitely on the rise. There’s been plenty of research out there in the western U.S. that the wildfire trends are growing as our climate warms. In Canada, the data until last year was a little bit more ambiguous. But there’s definitely a signal that what we’re seeing is likely being influenced with climate change.

I think what what we’re seeing this year is likely still going to be an outlier. But I do think going forward, we’re likely to see at least some smoke impacts every year.

We’ve also been having volatile, organic compounds inside the smoke that have also been serving as a pretty powerful base for ozone formation and seeing higher ozone days in ways we haven’t seen before. It’s kind of a one-two-punch.

You don’t, is the short answer. In Minnesota, we think of the Boundary Waters Canoe Area as being remote, and it is to an extent. But Canada takes it to a whole new level.

Canada has remote areas the size of the state of Texas and when you get a fire that starts there, there is no easy way to put that fire out, unless you air drop in firefighters who will then hand dig fire lines. This year, you have fires that are burning roughly the size of the state of South Carolina — think of how long it would take to hand carve fire lines around an entire U.S. state.

On the other side, when those people are out, far away from civilization, if something were to happen more locally, they’re no longer on the field and you have to bring them back. So they’re letting them burn just because they don’t have the manpower to extinguish them all.

It’s a multifaceted problem, but I think people lose sight of just how incredibly large this area is with no roads, no water lines, nothing out there. Your tools to control those fires are very limited.

The other point is that this is not just impacting the U.S. In Flin Flon, Manitoba, the air quality last month was over 500 for the entire month. So this is impacting people in Canada as much as it’s impacting people the United States, and no one’s happy with it.

I think the big thing to take away is to be vigilant. We’ve heard from a lot of people that checking the air quality has really become of part of their daily routine — just like you would check the normal weather forecast.

That’s probably the most prudent thing. Check the air quality, have a plan to deal with smoke, wear a mask. It will protect you. Be prepared if you are outside in the smoke, and listen to your body.

The Trump Administration has claimed that greenhouse gases don’t endanger people. And last month, the Environmental Protection Agency said it intends to rescind a landmark 2009 legal opinion — effectively ending all its climate regulations.

This all comes on the cusp of a rapidly-warming planet fueling extreme weather events.

A hotter planet poses an existential crisis on multiple fronts, said Alan Weisman, journalist and author of “Hope Dies Last: Visionary People Across the World, Fighting to Find Us a Future.”

“We’re all feeling the heat right now, but we’re not the only creatures on earth that are suffering from climate change,” he said. “Many of [the] species that we're dependent on pollinate our food [and] become our food. Species enrich our soil, filter the air and produce oxygen. They are all also threatened by climate change.”

While mankind needs to address this problem, Weisman said his research allowed him to uncover hope in the many ways people are taking climate action in their own hands — from fusion energy technology at The Massachusetts Institute of Technology to winning climate lawsuits in the Netherlands.

“It’s a combination of different things, in a lot of different places, that are each contributing to helping to slow down climate change before it gets out of control.”

To hear the full conversation, click play on the audio player above or subscribe to the Climate Cast podcast.

Despite efforts from some governments to slowly pull away from climate regulations and actions, one writer discovered a climate revolution through a combination of technology, science and community.

“I was looking for our realistic hopes, when we're standing at an existential brink,” said Alan Weisman, author of “Hope Dies Last: Visionary People Across the World, Fighting to Find Us a Future.”

“Hope is an active verb, and in place after place I found things that just completely surprised me,” he said.

For example, Weisman discovered a modular, wireless energy-sharing system in one of the world’s largest refugee camps in Bangladesh, where solar-powered houses connect via Wi-Fi for peer-to-peer energy exchange.

“By the end of it, I was so amazed by the solutions that people were coming up with who simply refuse to quit trying,” Weisman said. “These are not people who wait around for miracles to happen.”

To hear the full conversation, click play on the audio player above or subscribe to the Climate Cast podcast.

Minnesota’s clear, cool lakes are heating up over the summer, and those warmer waters can produce a toxic agal bloom.

“Blue-green algae is bacteria,” said Kim Laing, a surface monitoring manager with the Minnesota Pollution Control Agency. “It often looks like pea soup [or] green paint; sometimes it might have a smell to it. It thrives in warm, shallow, nutrient-rich lakes.”

Water that’s warmer than 75 degrees along with calm, sunny weather is a perfect recipe for blue-green algae, he said.

“We have had three to four degrees higher average July and August surface water temperatures in Minnesota lakes than compared to 50 years ago,” Laing said. “Our waters are warming, we have less ice during the winter.”

This means ripe conditions for blue-green algal blooms, which can be harmful to people and their pets.

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President Donald Trump’s massive budget bill eliminates tax credits and incentives for small and large scale solar and wind projects in Minnesota. It’s also projected to increase electricity bills across the state.

The clean energy industry in Minnesota is now trying to figure out a new path forward in the wake of the massive federal budget bill where credits will dry up at the end of the year.

“There’s no phase-down period,” said All Energy Solar co-founder and CEO Michael Allen. “At the end of 2025, the residential tax credit is being eliminated, the commercial tax credit has a slightly longer extension, but it’s still also pretty painful for the industry and ultimately on the commercial side.”

Allen explained that energy still needs to be produced — somewhere — and the utility industry will likely buy or generate electricity from traditional sources: oil, coal and gas.

“If you look at it from a cost comparison, solar and wind consistently beat out those traditional forms of electricity when it comes to cost,” Allen said. “The expectation is that consumers in Minnesota will ultimately have to pay higher electricity prices because of these adjustments to the tax credits.”

Allen added, from policy standpoint, the clean energy industry will look to individual states to step up, including Minnesota which has a 100 precent carbon-free goal by 2040.  

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Will Minnesota become a climate refuge for business?

A survey conducted by MIT Technology Review Insights, in conjunction with the Michigan Economic Development Corporation, asked 300 senior level executives in 14 industries how climate change is impacting their company’s bottom line.

The overwhelming answer was that many companies have been harmed, to some degree, by climate change. And nearly half said Minnesota and the Midwest are the best places to relocate their business to minimize climate impacts.

“Texas, California, New York — these are three states that actively experience the consequences of climate change,” said Kristoffer Tigue, a reporter for the Minnesota Star Tribune.

Tigue said insurance premiums have also skyrocketed nationwide, and some states impacted by extreme weather events, like California, home insurance is no longer available. The Midwest offers a refuge from those issues.

“It's milder thanks to our location in the middle of the country. We don’t get major wildfires, and we definitely don’t experience hurricanes and we tend to have an abundance of natural resources, including water.”

Tigue explained that climate change is just one factor that would determine whether a business decides to relocate, and that just 6 percent of executives who took part in the survey said they’re considering a move in the next five years.

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An increase in water vapor in the atmosphere is driving more extreme weather around the world.

How is that playing out here in Minnesota?

John Abraham, thermal sciences professor and mechanical engineering program director at University of St. Thomas, shared more about the little-known but growing climate concern.

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This week brought another significant tornado outbreak to parts of Minnesota.

Downtowns for the Twin Cities, Rochester and Duluth were spared from any storm damage, but are cities safer from tornadoes than rural parts of Minnesota? Does the urban heat island effect spare urban residents from a tornado tearing through their cities?

“The urban heat island probably would not save you if the storm were in a position to enter that urban area,” said climatologist Kenneth Blumenfeld. “We should definitely disabuse ourselves of this myth.”

Blumenfeld, who has researched urban tornados, said the probability of tornadoes striking skyscraper-filled cities like the Twin Cities, or smaller downtowns, are just as high as elsewhere.

“All the big cities, [in] tornado prone regions like the Midwest, the South and the Great Plains, have relatively high amounts of tornado activity — it’s a lesson for all of us that tornadoes can and do hit cities.”

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Electric vehicle use in Minnesota boomed over the past decade due to the popular fleet of Tesla vehicles driving into the market.

However, the Q1 auto sales report from earlier this year, showed a drop in sales for Tesla’s EVs. The indication that there might be a slowing popularity for the brand had some experts blame the company’s CEO Elon Musk and his relationship with American politics. Even Gov. Tim Walz took at jab at Musk and the company’s business woes.

“The governor has certainly continued, to some degree, his feud with Elon Musk,” said Walker Orenstein, energy, natural resources and sustainability reporter for the Minnesota Star Tribune. “[Walz] jokes about it not being the best idea, because Elon Musk is a very rich man.”

Politics could be a driving force in the drop in Tesla sales, but Orenstein explained the EV growing market is another culprit.

“Tesla’s share of the EV market was declining well before [Q1 auto sales] — I think that it reflects more options that are available to people,” Orenstein said. “At this point in time, the governor doesn’t need Tesla and Musk quite to the same degree, and that’s because the marketplace for EVs has just grown so much.”

New EV companies, and well-established automakers have been electrifying the EV market across the country, but cold weather and a lack of model options are also the reason why Minnesotans haven’t fully embraced the technology.

To hear the full conversation, click play on the audio player above or subscribe to the Climate Cast podcast.