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Weather and Climate

NASA’s ECOSTRESS instrument on June 19, 2024, recorded scorching roads and sidewalks across Phoenix where contact with skin could cause serious burns in minutes to seconds, as indicated in the legend.

NASA map shows temperatures up to 160 degrees on Phoenix streets, sidewalks

Jul 6, 2024 Surface temperatures that hot can cause severe contact burns within minutes or seconds.
The sun sets over Tucson in July 2020, which was the hottest July on record.

Millions swelter under dangerous Fourth of July heat wave

Jul 4, 2024 Around 134 million people in the U.S. are under alerts as an “extremely dangerous and record-breaking” heat wave broils much of the country.
Katia Lamer, director for the Center for Multiscale Applied Sensing at the Brookhaven National Laboratory who leads the team that drives the mobile weather trucks on Tuesday, July 2, at the University of Arizona in Tucson, Ariz. Lamer says the lack of climate data can make it difficult to quantify inequities in regional heat and air quality.

Arizona researchers tackle urban heat with innovative weather data collection

Jul 2, 2024 UA team partners with DOE’s Brookhaven Lab to study and mitigate extreme heat in the Southwest.
U.S. Department of Agriculture’s Rural Development administrator Andy Berke and Patrick Ledger, Arizona Generation and Transmission Cooperatives’ CEO, cut the ribbon to a new battery energy storage system in Sahuarita, AZ on Tuesday, July 2, 2024.

$55.2 million to boost clean energy in rural Arizona with new battery systems

Jul 2, 2024 Federal funding will support three new battery energy storage facilities, lower energy bills, create jobs, and promote sustainability in cities like Sahuarita.
Downtown Phoenix viewed from City Hall on March 4, 2024. The city's water leaders say they're nearing the ceiling on how much water can be saved through traditional conservation, and are instead turning their eyes and budgets toward new technology that will help decrease demand for water from the Colorado River and underground aquifers.

Does Arizona have enough water?

Jun 25, 2024 Phoenix-area cities are spending big to make sure it does.
Saguaro cactus amid mid-afternoon sun.

At least 6 heat-related deaths reported in metro Phoenix so far this year as high hits 115 degrees

Jun 23, 2024 A heat wave baked most of the United States on Friday, with numerous areas expected to see record-breaking temperatures.
Margarita Salazar, 82, wipes the sweat off with a tissue inside her home amid high heat in Veracruz, Mexico, on June 16, 2024. Human-caused climate change intensified and made far more likely this month's killer heat with triple digit temperatures, a new flash study found Thursday, June 20.

Climate change made killer heat wave in Mexico, Southwest US even warmer and 35 times more likely

Jun 20, 2024 A new study finds that human-caused climate change dialed up the heat and drastically increased the odds of this month's killer heat that has been baking the Southwestern United States, Mexico and Central America.
City crews are preparing barricades to direct motorists away from flooded roads.

Tucson braces for potential monsoon storms

Jun 19, 2024 City crews are preparing barricades to direct motorists away from flooded roads.
Strong Arm, a well-known saguaro cactus in the Tortolita Preserve near Marana, was estimated to be 150 to 200 years old and 40 feet tall when it toppled during an August storm. But the actual cause of death was Erwinia cacticida, a bacteria that causes saguaros to rot and ooze a thick, black liquid.

More than 70 million people in the US are under heat alerts

Jun 17, 2024 Officials again are warning residents to take precautions, go indoors and hydrate.
Monsoon clouds hover above a southern Arizona neighborhood.

UA Monsoon Madness returns for 2024

Jun 17, 2024 Hundreds are expected to enter the annual online contest to predict stormy weather.
Saguaro cactus amid mid-afternoon sun.

The Buzz: Coping with Extreme Heat

Jun 14, 2024 As summer temperatures get dangerous, we look at efforts to keep people safe.
Principal Deputy Assistant Secretary for Public and Indian Housing Richard Monocchio announces new Housing and Urban Development guidelines on financial assistance for air conditioning costs in Tucson, Ariz., on Thursday, June 13, 2024.

HUD will allow more federal dollars to go toward electric bill assistance

Jun 13, 2024 Government officials visited a public housing complex in Tucson to make the announcement.
Looking east across Roosevelt Lake in Central Arizona.

Conservation groups threaten legal action over Pinto Valley Mine expansion

Jun 13, 2024 Sierra Club and Maricopa Audubon Society claim violations of the Endangered Species Act, citing risks to wildlife and water resources.
A monsoon storm drops localized, heavy rainfall over northwest Tucson, Marana, and Oro Valley. From August 2022.

Conflicting weather patterns bring monsoon uncertainty

Jun 11, 2024 The upcoming transition between an El Niño winter and a La Niña summer is unique.
Pima County Medical Examiner Greg Hess at his office in Tucson, Ariz. Hess and another Arizona-based medical examiner are rethinking how to catalog and count heat-related deaths, a major step toward understanding the growing impacts of heat.

Here's why an Arizona medical examiner is working to track heat-related deaths

Jun 11, 2024 Rethinking how to catalog and count heat-related deaths is a major step toward understanding the growing impacts of climate change.
On Friday, May 31, 2024, Senator Mark Kelly gathered with local solar industry leaders at the Solar Gain Inc., facility in Tucson, Ariz., to discuss federal investments into the state for renewable energy. From left to right, Ben Bryce, senior manager of the Environmental Defense Fund Action, Craig Storlie, Tucson solar homeowner, Senator Mark Kelly, Priya Sundareshan, Arizona State Senator, Autumn Johnson, Executive Director of Arizona Solar Energy Industries Association, and Adrian Keller, Arizona program director for Solar United Neighbors of Arizona (SUN).

Arizona advances in renewable energy with federal investments

May 31, 2024 Senator Mark Kelly and other local leaders talk about the state's clean energy growth and jobs.

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