Climate and environment updates: October heat made more likely due to climate change

(NEW YORK) — The climate crisis is not a distant threat; it’s happening right now and affecting what matters most to us. Hurricanes intensified by a warming planet and drought-fueled wildfires are destroying our communities. Rising seas and flooding are swallowing our homes. And record-breaking heatwaves are reshaping our way of life.

The good news is we know how to turn the tide and avoid the worst possible outcomes. However, understanding what needs to be done can be confusing due to a constant stream of climate updates, scientific findings, and critical decisions that are shaping our future.

That’s why the ABC News Climate and Weather Unit is cutting through the noise by curating what you need to know to keep the people and places you care about safe. We are dedicated to providing clarity amid the chaos, giving you the facts and insights necessary to navigate the climate realities of today — and tomorrow.

October record heat made more likely because of climate change

It may be fall, but it feels a lot like summer in much of the country. That has some people wondering: Is climate change responsible for these record-high temperatures? With climate attribution science, we can now answer that question and determine when human-amplified climate change is responsible for extreme weather events and the significance of that impact.

Using advanced computer models, climate attribution science takes a real-world weather event, such as a record high-temperature day or a hurricane, and compares it to the world where human-caused, post-industrial greenhouse gas emissions don’t exist. By comparing what is actually happening with what would have happened without human intervention, science can estimate how likely or severe a weather event has become due to climate change.

Climate Central, a nonprofit climate research and communications organization, uses climate attribution science to provide real-time data that shows “how much climate change influences the temperature on a particular day.” The information is displayed on a global interactive map called the Climate Shift Index.

For example, the Index showed that human-amplified climate change made Sunday’s record high in Tucson, Arizona of 98 degrees at least three times more likely. The same was true for Waco, Texas, which broke a record with 92-degree heat, and Mobile, Alabama, which hit a record 90 degrees.

Extreme heat is the deadliest weather-related hazard in the U.S., with children and adults over 65 being among the most vulnerable to heat-related illnesses and death. And the average number of heat waves that major U.S. cities experience each year has doubled since the 1980s, according to the federal government’s Fifth National Climate Assessment.

-ABC News Climate Unit’s Matthew Glasser

How crops will fare with 45% of the US experiencing drought

The U.S. is experiencing the driest fall on record, which could potentially impact the quality of upcoming autumn harvests, experts told ABC News.

About 77% of the mainland U.S. is abnormally dry, and almost half of the country is experiencing drought, according to the U.S. Drought Monitor. The spatial pattern of the dry conditions varies widely across the continent, Josue Medellin-Azuara, a professor of civil and environmental engineering at the University of California Merced, told ABC News.

Improvement in the drought is not expected for most of the South, the Plains and parts of the Upper Midwest due to expected La Nina conditions this winter that would further reinforce the dryness, according to forecasts by the National Oceanic and Atmospheric Administration.

However, a lot of the crops in these regions that harvest in the fall had good growing conditions throughout the summer and are in the process of being harvested, meaning overall output should not be heavily impacted, Joseph Glauber, senior research fellow at the International Food Policy Research Institute and former chief economist for the U.S. Department of Agriculture, told ABC News.

Read more here.

EPA cancels toxic pesticide used in growing produce

The United States Environmental Protection Agency (EPA) said it’s canceling any product containing the pesticide dimethyl tetrachloroterephthalate (DCPA), also known as Dacthal.

According to the EPA, their decision is based on comprehensive scientific studies that indicate potential thyroid toxicity linked to DCPA. The agency says research suggests that exposure to this pesticide during pregnancy can lead to changes in thyroid hormone levels in unborn children. Studies cited by the EPA indicate that these hormonal changes could be associated with various health concerns, including low birth weight, impaired brain development and reduced IQ. That research suggests that these developmental challenges may also have long-term effects on motor skills.

DCPA is used in the industrial farming of broccoli, Brussels sprouts, cabbage and onions. While pregnant women working in agriculture are most at risk, pesticides can travel into neighboring communities via the air and runoff, putting non-agricultural workers at risk as well.

In a press release, EPA’s assistant administrator for the office of chemical safety and pollution prevention, Michal Freedhoff, wrote, “With the final cancellation of DCPA, we’re taking a definitive step to protect pregnant women and their unborn babies. The science showing the potential for irreversible harm to unborn babies’ developing brains, in addition to other lifelong consequences from exposure, demands decisive action to remove this dangerous chemical from the marketplace,” Freedhoff added.

-ABC News Climate Unit’s Matthew Glasser

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