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Heat wave building in Southwest freight markets (with forecast video)

Includes a key reefer market in California

Photo: Jim Allen/FreightWaves

A heat wave is likely to spread across the Southwestern United States later this week, possibly putting extra stress on drivers, their trucks and temperature-sensitive freight.

SONAR Critical Events: Tuesday, July 28, 2020, 8 a.m. EDT; Excessive heat warnings

Even by midsummer standards, the weather will be scorching from southeastern California to southern Nevada, as well as in western and southern Arizona Thursday through Saturday.

Highs could reach 105 to 120 degrees in Las Vegas; Phoenix, Yuma and Tucson, Arizona; portions of southeastern California, such as El Centro and Palm Springs; in addition to places in between and immediately surrounding these areas. The predicted temperatures are 5 to 15 degrees above normal for this time of the year and may tie or break daily record highs. Even low temperatures will be very warm, mosty in the 80s.

The National Weather Service has issued excessive heat warnings across the region. For now, they begin Thursday morning and last through Saturday evening.


This level of heat can be brutal on trucks. Drivers heading into or through the Southwest should make sure their trucks are in tip-top shape to avoid breakdowns or air-conditioning malfunctions in the extreme heat.

Reefer drivers will need to show their temperature-sensitive freight some extra care, making necessary adjustments to their trailer settings to avoid damaged loads.

The heat wave will hit part of the Ontario, California, freight market, where many reefer drivers may be headed this week. It has the second-highest level of reefer outbound volumes, according to the latest data from FreightWaves.

SONAR Ticker: ROTVI

This is seen on the SONAR Reefer Outbound Tender Volume Index (ROTVI) map directly above, in which markets with high reefer volumes appear in the darkest blue.


All drivers should take care of themselves by spending as little time as possible outside their trucks. Heat exhaustion or heat stroke can set in quickly under the scorching temperatures.

Click here for more FreightWaves articles by Nick Austin.

Nick Austin

Nick is a meteorologist with 20 years of forecasting and broadcasting experience. He was nominated for a Midsouth Emmy for his coverage during a 2008 western Tennessee tornado outbreak. He received his Bachelor of Science in Meteorology from Florida State University, as well as a Bachelor of Science in Management from the Georgia Tech. Nick is a member of the American Meteorological Society and National Weather Association. As a member of the weather team at WBBJ-TV in Jackson, Tennessee, Nick was nominated for a Mid-South Emmy for live coverage of a major tornado outbreak in February 2008. As part of the weather team at WRCB-TV in Chattanooga, Tennessee, Nick shared the Chattanooga Times-Free Press Best of the Best award for “Best Weather Team” eight consecutive years.