Can we beat the heat?

Today's Guest Blog is from Allison Crimmins, an environmental scientist with EPA’s Climate Change Division. She focuses on the impacts and risks associated with climate change, especially on human health. Prior to joining EPA, she earned one Masters degree in oceanography by exploring past climates in ocean sediments and a second Masters’ degree in public policy from the Harvard Kennedy School. She lives, works, and judges the occasional science fair in Washington, D.C. but still cheers for the Chicago Bears.

See how recorded temperatures have risen in the
United States in since 1901 / U.S. EPA

I have an uncle in Arizona who likes to send taunting emails in the middle of winter, bragging about his region’s warm temperatures while my Midwestern family freezes. The tables would be turned in summer, and he’d get his share of emails when Arizona’s temperatures soared. Lately though, the rate of warming in the Midwest has accelerated, with temperatures rising three times as fast between 1980 and 2010 than the long-term temperature increase . With extremely hot days—the kind we’re used to seeing once in 20 years—projected to become commonplace across the U.S., there won’t be many places in the country left with bragging rights.

Heat waves have become more frequent and more intense, especially in the West, and they’re expected to become more intense across the entire U.S. Aside from making us miserable, heat waves can also make us very sick. Extreme heat is associated with increased hospital visits for cardiovascular, kidney, and respiratory disorders, and can also lead to an increased number of deaths from heat stroke and other cardiovascular and respiratory diseases.

The health risks from heat are heightened in cities, where the urban heat island effect can intensify temperatures. Cities can be up to 10°F warmer than surrounding rural areas and can maintain warmer temperatures throughout the night. With more people moving to urban areas and nighttime temperatures rising faster than daytime temperatures, there’s a lot of people who can’t catch a break from the heat.

It might be easy to think this is an issue that affects “other people,” but not me. Those most vulnerable to extreme heat include children, the elderly, people who work or exercise outdoors, pregnant women, some communities of color, and those with pre-existing medical conditions. Extreme heat affects people living in cities, but also people in rural areas that haven’t needed air conditioning in the past. It affects people in Arizona, the Midwest, and everywhere in between. When you look back at that list, it’s evident that we all fit into one or more of those categories, at least at some point in our lives.

The good news is that heat related deaths and illnesses are preventable and there is a lot of great information out there to help beat the heat. The Centers for Disease Control and Prevention has great resources on extreme heat and hot weather tips.

In addition to preparing for the heat, it’s also important to take action on climate change to help reduce these threats. EPA is taking a number of steps to reduce greenhouse gas emissions, including cutting carbon pollution from existing power plants, setting standards to increase fuel efficiency for all new cars and trucks sold through 2025, and working closely with the private sector to promote programs like ENERGY STAR, which helps Americans save money and improves the energy-efficiency of their appliances, homes, and businesses. To learn more about what EPA is doing to address climate change, please see: epa.gov/climatechange

You can also take action on climate change! Since everyone uses energy, everyone can be part of the solution. To learn about simple steps you can take to reduce your carbon footprint, see www.epa.gov/wycd. One of the best ways to make a difference, in my opinion, is just to share what you learn about climate change with friends and family. A good place to learn more about observed and projected climate impacts where you live is: www.epa.gov/climatechange

Washing your hands with cooler water can be better for the environment

Have you ever been told that it’s better to wash your hands with hot water? According to a recent study conducted by researchers at Vanderbilt University, using clean running water at a cooler temperature can be just as effective — and it can be better for the environment, too.
 
While it’s true that heat kills bacteria, the temperature needed to kill germs on your hands could burn you. That means that there may be no real benefit to washing your hands with hot water. In fact, using a really high temperature can irritate your skin, which can make bacteria stay on your hands.
 
So why do folks use hot water if it’s not killing germs? One reason is that many hand soaps tend to work better with warmer water. Another reason may be that they’ve always done it that way and just don’t know any better!

 

So how does using cooler water help the environment, you may ask? The fact is that heating water takes energy. Creating energy — such as through burning fossil fuels like such as coal, natural gas and oil — can lead to the release of gases that trap heat in the atmosphere, known as greenhouse gases. Increasing levels of greenhouse gases raise global temperatures leading to climate change.

 

So does that mean you should only use really, really cold water to wash your hands? That might not be a good idea either. It takes awhile to wash your hands properly, and that’s hard to do when the water is freezing cold. Your best bet is to pick a temperature somewhere in the middle that feels comfortable to you.

 

The key thing is to make sure that you’re washing your hands properly. This means that you are scrubbing, rinsing and drying your hands several times a day, particularly before eating and after using the bathroom. Here are some tips, courtesy of the Centers for Disease Control and Prevention:

• Wet your hands with running water. Remember to immediately turn off the tap to make sure you’re not wasting water.
• Apply soap and rub your hands together. Make sure to clean the back of your hands, under your nails and between your fingers, and continue rubbing your hands for at least 20 seconds.
• Rinse your hands well under clean, running water.
• Dry your hands using a clean towel or air dry them.

For more tips, check out our Get Ready hand-washing page, which features fact sheets in both English and Spanish.