the nature diaries

The ice cream drips,
The pavement steams,
The air conditioner hums.
Summer arrives in familiar ways,
Yet each year it seems
We spend a little more effort
Escaping the heat.

There are certain things that make a day feel like summer. Things like ice cream melting faster than you can eat it, and the smell of sunscreen, as well as walking into an air-conditioned room and immediately deciding you never want to leave.

Summer has always been hot. That’s nothing new, but in recent years, it feels like heat has become a defining feature of this season.

Across much of the United States, including New Jersey, heat waves are becoming more frequent and lasting longer than they once did. The hottest days of the year are getting hotter, and warm nights, which provide relief after the sun goes down, are becoming less common (U.S. Environmental Protection Agency; National Climate Assessment).

As temperatures rise, so does our need to stay cool, meaning air conditioners run longer and fans spin all day. On especially hot afternoons, entire communities seem to retreat indoors until the sun begins to set.

That’s where the so-called “ice cream paradox” becomes evident. The hotter it gets, the more energy we use trying to escape the heat. During heat waves, electricity demand often reaches some of its highest levels of the year because homes, schools, offices, and businesses are all using cooling systems at the same time (U.S. Energy Information Administration).

Of course, cooling itself isn’t the problem. In many cases, air conditioning is lifesaving. During extreme heat events, access to cool indoor spaces can prevent heat-related illnesses and deaths, but the challenge is that keeping millions of people cool requires enormous amounts of energy. Historically, much of that energy has come from fossil fuels. So the same warming temperatures that increase our need for cooling can also increase the demand for energy that contributes to greenhouse gas emissions.

The paradox is: hotter summers lead to more cooling, but more cooling requires more energy, and more energy contributes to further warming. It’s a cycle that is growing in scale every year.

However, some of the most effective cooling solutions aren’t machines at all. A mature shade tree can significantly lower surface and air temperatures in the area around it. Parks and green spaces, and tree-lined streets help cool neighborhoods naturally, reducing the need for energy-intensive cooling while making communities more comfortable during the summer months (U.S. Forest Service).

A tree offers something no air conditioner can: relief without a power cord.

I’ll still eat ice cream this summer. I’ll still enjoy stepping into an air-conditioned room after being outside for too long and I’ll still look forward to warm evenings and sunny afternoons, but these small comforts will remind me of something bigger. 

Summer is changing and as temperatures continue to rise, staying cool is becoming less of a luxury and more of a necessity. The ice cream may melt faster than it used to. The question is whether we’ll be ready for everything else that comes with the heat.