Please ensure Javascript is enabled for purposes of website accessibility

West Bank Town Becomes ‘Big Prison’ as Israel Fences It In

1 day ago

Trump Says He’s Willing to Let Migrant Farm Laborers Stay in US

1 day ago

US Electric Vehicle Tax Breaks Will Expire on Sept. 30

2 days ago

Eyeing Arctic Dominance, Trump Bill Earmarks $8.6 Billion for US Coast Guard Icebreakers

2 days ago

Trump’s Sweeping Tax-Cut and Spending Bill Wins Congressional Approval

2 days ago

Americans Celebrate Their Independence With Record-Breaking Travel Numbers

2 days ago

US Supreme Court to Decide Legality of Transgender School Sports Bans

2 days ago

Nvidia Set to Become the World’s Most Valuable Company in History

2 days ago

Poll: 41% in US ‘Extremely Proud’ to Be American, Near Historic Low

2 days ago
What's Behind This Record-Breaking Heatwave?
gvw_ap_news
By Associated Press
Published 4 years ago on
June 18, 2021

Share

Much of the American West has been blasted with sweltering heat this week as a high pressure dome combines with the worst drought in modern history to launch temperatures into the triple digits, toppling records even before the official start of summer.

Record daily highs were seen this week in parts of Arizona, California, New Mexico, Montana, Wyoming and Utah. Phoenix, which is baking in some of the U.S. West’s hottest weather, hit a record-breaking 118 degrees Thursday and was expected to reach 116 degrees Friday and Saturday.

“Very dangerous record breaking heat should continue today across the deserts with well above normal highs,” the National Weather Service’s Phoenix staff wrote on Facebook. “A very good day to stay indoors.”

Why is the American West So Hot This Week?

The heat comes from a high pressure system over the West, a buckle in the jet stream winds that move across the U.S. and vast swaths of soil sucked dry by a historic drought, said Marvin Percha, a senior meteorologist for the agency in Phoenix.

He and other scientists say the heat wave is unusual because it arrived earlier and is staying longer than in most years.

“June last year, things seemed pretty normal,” noted Park Williams, a University of California, Los Angeles, climate and fire scientist. “The record-breaking heat waves came in August and September.”

But with such an early heat wave this year, “this could be the tip of the iceberg,” Williams said.

What Roles do Drought and Climate Change Play?

A two-decade-long dry spell that some scientists refer to as a “megadrought” has sucked the moisture out of the soil through much of the Western United States. Researchers said in a study published last year in the journal Science that man-made climate change tied to the emission of greenhouse gases can be blamed for about half of the historic drought.

Scientists studying the dry period that began in 2000 looked at a nine-state area from Oregon and Wyoming down through California and New Mexico and found only one other that was slightly larger. That drought started in 1575, a decade after St. Augustine, Florida, was founded and before the Pilgrims landed on Plymouth Rock in 1620.

The hot weather can be tied to the drought drying out the landscape. Normally, some of the sun’s heat evaporates moisture in the soil, but scientists say the Western soil is so dry that instead that energy makes the air even warmer.

“When the soil is wet, heat waves aren’t so bad,” said Williams, who has calculated that soil in the western half of the nation is the driest it has been since 1895. “But if it’s dry, we are under extreme risk.”

How Do Recent Wildfires Figure Into This?

Scientists say the wildfires that have erupted in recent days have been fed by the excessive heat across the region. Climate change contributes to the drought conditions and makes trees and shrubs more likely to catch fire.

At least 14 new wildfires broke out this week in Montana and Wyoming as the record heat sparked an early start to the fire season. Firefighters also battled blazes in Arizona and New Mexico.

“From a fire potential standpoint, what is capable this year, it is certainly much more severe than we’ve seen in the past,” U.S. Department of Agriculture fire meteorologist Gina Palma said in a climate briefing Thursday.

Palma said the drought-related fire risks were especially pronounced in higher elevations across much of the U.S. West, from the Rocky Mountains down into the Southwest and parts of California.

“You will be seeing very extreme fire behavior, certainly conditions that we would not normally see in June,” she said.

Is This the New Normal?

A growing number of scientific studies are concluding that heat waves in some cases can be directly attributed to climate change, said Kristie L. Ebi, a professor at the Center for Health and the Global Environment at the University of Washington.

That means the U.S. West and the rest of the world can expect more extreme heat waves in the future unless officials move to cut down on greenhouse gas emissions, Ebi and other scientists say.

A study last month estimated the percent and number of heat deaths each year that can be attributed to human-caused climate change. It included about 200 U.S. cities and found more than 1,100 deaths a year from climate change-caused heat, representing about 35% of all heat deaths in the country.

On average each year, Phoenix has 23 climate-triggered heat deaths, Los Angeles has 21 and Tucson has 13, the study said.

“Climate change is harming us now,” Ebi said. “It’s a future problem, but it’s also a current problem.”

RELATED TOPICS:

DON'T MISS

What Are Fresno Real Estate Experts Predicting for 2025 and Beyond?

DON'T MISS

First California EV Mandates Hit Automakers This Year. Most Are Not Even Close

DON'T MISS

How Trump’s ‘Big, Beautiful Bill’ Will Make China Great Again

DON'T MISS

What’s Caitlin Clark Worth to the WNBA? A Lot More Than Her $78,066 Salary.

DON'T MISS

Trump to Sign Tax-Cut and Spending Bill in July 4 Ceremony

DON'T MISS

Madre Fire Spurs Evacuations Across 3 Counties, Grows to More Than 70,000 Acres

DON'T MISS

Clovis, Sanger, Madera, and Bass Lake Will Light the Sky With Fireworks Shows Tonight

DON'T MISS

Oil Dips Ahead of Expected OPEC+ Output Increase

DON'T MISS

613 Killed at Gaza Aid Distribution Sites, Near Humanitarian Covoys, Says UN

DON'T MISS

Fresno County Authorities Investigating Suspicious Death of Transient Man

DON'T MISS

West Bank Town Becomes ‘Big Prison’ as Israel Fences It In

DON'T MISS

Israeli Military Kills 20 in Gaza as Trump Awaits Hamas Reply to Truce Proposal

UP NEXT

Americans Celebrate Their Independence With Record-Breaking Travel Numbers

UP NEXT

Poll: 41% in US ‘Extremely Proud’ to Be American, Near Historic Low

UP NEXT

Poorest Americans Dealt Biggest Blow Under Senate Republican Tax Package

UP NEXT

Poll: Most Americans Say National Divide, Political Violence Threaten Democracy

UP NEXT

Trump Pulls Back 150 Guard Troops From Federal Duties in California

UP NEXT

Suspect Identified in Ambush Shooting That Killed 2 Idaho Firefighters

UP NEXT

Suspect Identified in Ambush Shooting That Killed 2 Idaho Firefighters

UP NEXT

US Supreme Court Lets Parents Take Kids Out of Classes With LGBT Storybooks

UP NEXT

Bill Moyers, Broadcaster and LBJ’s White House Press Secretary, Dies at 91

UP NEXT

Tesla Executive, Elon Musk Confidant Leaves EV Maker, Bloomberg News Reports

Madre Fire Spurs Evacuations Across 3 Counties, Grows to More Than 70,000 Acres

1 day ago

Clovis, Sanger, Madera, and Bass Lake Will Light the Sky With Fireworks Shows Tonight

1 day ago

Oil Dips Ahead of Expected OPEC+ Output Increase

1 day ago

613 Killed at Gaza Aid Distribution Sites, Near Humanitarian Covoys, Says UN

1 day ago

Fresno County Authorities Investigating Suspicious Death of Transient Man

1 day ago

West Bank Town Becomes ‘Big Prison’ as Israel Fences It In

1 day ago

Israeli Military Kills 20 in Gaza as Trump Awaits Hamas Reply to Truce Proposal

1 day ago

Valley Crime Stoppers’ Most Wanted Person of the Day: Rachelle Maria Blanco

1 day ago

Russia Pounds Kyiv With Largest Drone Attack, Hours After Trump-Putin Call

1 day ago

Boxer Chavez Jr Expected to Be Deported to Mexico to Serve Sentence, Mexican President Says

1 day ago

How Trump’s ‘Big, Beautiful Bill’ Will Make China Great Again

Can you hear it — that loud roar coming from the East? It’s the sound of 1.4 billion Chinese laughing at us. Thomas L. Friedman The New Yo...

12 hours ago

Solar Farm in Riesel, Texas
12 hours ago

How Trump’s ‘Big, Beautiful Bill’ Will Make China Great Again

Caitlin Clark Signs T-Shirt
13 hours ago

What’s Caitlin Clark Worth to the WNBA? A Lot More Than Her $78,066 Salary.

President Donald Trump speaks during a press conference in the Roosevelt Room at the White House in Washington, D.C., U.S., May 12, 2025. (Reuters File)
1 day ago

Trump to Sign Tax-Cut and Spending Bill in July 4 Ceremony

The Madre Fire burning near New Cuyama has scorched 70,801 acres as of Friday, July 4, 2025, afternoon, making it California’s largest wildfire of the year, with only 10% containment and multiple evacuation zones in place. (CalFire)
1 day ago

Madre Fire Spurs Evacuations Across 3 Counties, Grows to More Than 70,000 Acres

1 day ago

Clovis, Sanger, Madera, and Bass Lake Will Light the Sky With Fireworks Shows Tonight

A pumpjack operates at the Vermilion Energy site in Trigueres, France, June 14, 2024. (Reuters File)
1 day ago

Oil Dips Ahead of Expected OPEC+ Output Increase

Palestinians gather to collect what remains of relief supplies from the distribution center of the U.S.-backed Gaza Humanitarian Foundation, in Rafah, in the southern Gaza Strip, June 5, 2025. (Reuters File)
1 day ago

613 Killed at Gaza Aid Distribution Sites, Near Humanitarian Covoys, Says UN

Billy Wayne Sinisgalli, a 54-year-old transient known locally as Wayne, was found dead along a rural Fresno road Wednesday in what authorities are investigating as a suspicious death. (Fresno County SO)
1 day ago

Fresno County Authorities Investigating Suspicious Death of Transient Man

Help continue the work that gets you the news that matters most.

Search

Send this to a friend