Heat wave to scorch Southwest freight markets (with forecast video)

Photo: Jim Allen/FreightWaves

Another heat wave will begin scorching parts of the southwestern United States in a day or two, putting a little more stress on drivers, their trucks and their temperature-sensitive freight.

SONAR Critical Events: Tuesday, August 11, 2020, 8 a.m. EDT; Excessive heat watch (orange-shaded areas)

A heat wave just hit the Southwest in late July. High temperatures in Phoenix, Tempe and Yuma, Arizona the last four days of July ranged from 111 to 119 degrees, 5 to 10 degrees above normal. The same thing happened in El Centro, California.

Daily record highs of 115, 118 and 116 were set in Phoenix on July 29, 30 and 31, respectively. A daily record high of 115 was set in Tempe on July 31.

A potentially major heat wave could begin in these same areas on Thursday, August 13, persisting at least through the weekend. Cloud cover may keep temperatures in check Wednesday, but the extreme heat could start in some areas that day depending on when the cloud cover thins out.

The impending heat wave is a result of the combination of a subtropical ridge of high pressure plus dry, southwesterly winds aloft. Air sinks, expands and heats rapidly under areas of high pressure. The National Weather Service (NWS) is forecasting the high pressure ridge to strengthen as it moves over the region. The NWS has issued an excessive heat watch across the region, forecasting high temperatures of 104 to 118 degrees, depending on exact location.

https://vimeo.com/446775876

More specifically, temperatures will peak at 110 to 116 degrees in the Phoenix metropolitan area, including Mesa, Chandler, Tempe and Sun City; 104 to 112 in the Tonto Basin, just east of Phoenix; 108 to 114 in Scottsdale and Apache Junction, Arizona; 111 to 16 in Gila Bend and Yuma, Arizona; and 111 to 118 in El Centro, California.

The heat wave will affect major routes such as interstates 8, 10, 17 and 40. This includes portions of the Ontario, California freight market, which has high levels of reefer loads available, according to the latest FreightWaves data.

Reefers are climate-controlled trailers used to transport temperature-sensitive freight such as produce, as well as beverages and other liquids. Excessive heat can exert extra strain on reefers, so drivers have to make sure their trailers are set at just the right temperature levels.

SONAR ticker: ROTVI

The SONAR map directly above shows that Ontario is a leading market in the Reefer Outbound Tender Volume Index (ROTRI). This indicates that many drivers will be heading into the heat wave to pick up reefer loads in southern California over the next several days.

Click here for more FreightWaves articles by Nick Austin.

Upcoming FreightWaves Events
Compliance

Brokerage Compliance Symposium

The day before F3. Every compliance issue you face - fraud exposure, carrier liability, FMCSA rules, cargo theft, insurance gaps - navigated by attorneys and operators defining best practices in a changing industry.

October 26, 2026
The Signal at Chattanooga Choo Choo • Chattanooga, TN
Register Now
Awards

F3 Awards Dinner

The night before F3. FreightTech100 companies honored. FreightTech 25 and Shipper of Choice winners revealed live. Cocktail reception into dinner and live music - 300 industry leaders in one purpose-built room.

October 26, 2026
The Signal at Chattanooga Choo Choo • Chattanooga, TN
Register Now
FreightTech

F3: Future of Freight Festival

Industry-defining keynotes, rapid-fire technology demos, and industry leaders networking in experiences across Chattanooga - plus the inaugural F3 Awards Dinner featuring the FreightTech and Shipper of Choice reveals.

October 27, 2026 – October 28, 2026
The Signal at Chattanooga Choo Choo • Chattanooga, TN
Register Now
Compliance Brokerage Compliance Symposium Oct 26 • The Signal at Chattanooga Choo Choo • Chattanooga, TN

The day before F3. Every compliance issue you face - fraud exposure, carrier liability, FMCSA rules, cargo theft, insurance gaps - navigated by attorneys and operators defining best practices in a changing industry.

The Signal at Chattanooga Choo Choo • Chattanooga, TN Register Now
Awards F3 Awards Dinner Oct 26 • The Signal at Chattanooga Choo Choo • Chattanooga, TN

The night before F3. FreightTech100 companies honored. FreightTech 25 and Shipper of Choice winners revealed live. Cocktail reception into dinner and live music - 300 industry leaders in one purpose-built room.

The Signal at Chattanooga Choo Choo • Chattanooga, TN Register Now
FreightTech F3: Future of Freight Festival Oct 27 – Oct 28 • The Signal at Chattanooga Choo Choo • Chattanooga, TN

Industry-defining keynotes, rapid-fire technology demos, and industry leaders networking in experiences across Chattanooga - plus the inaugural F3 Awards Dinner featuring the FreightTech and Shipper of Choice reveals.

The Signal at Chattanooga Choo Choo • Chattanooga, TN Register Now