Has this been confirmed?
The data for KIFP (Bullhead City, Arizona) for the night between July 15-16. There was a huge heat burst there and they hit 136 degrees!
Here is the data on wunderground.
Mean Temperature 114 °F -
Max Temperature 136 °F 106 °F 136 °F (2017)
Min Temperature 91 °F 85 °F 72 °F (1993) https://www.wunderground.com/history/airport/KIFP/2017/07/16/DailyHistory.html?req_city=Bullhead City&req_state=AZ&reqdb.zip=86439&reqdb.magic=4&reqdb.wmo=99999
Mean Temperature 112 °F -
Max Temperature 131 °F 106 °F 131 °F (2017)
Min Temperature 93 °F 85 °F 74 °F (1993)
From the data it looks like the heat burst started at 7:55 PM and from there until 1:15 AM it was over 130 degrees! What a massive and long lasting heat burst! By looking at past heat bursts that have occurred in different regions, they always seem to occur late at night- any idea why that might be?
Historic heat bursts of the past
These are cases when temperatures over 56.7 °C or 134 °F (the highest officially confirmed in the world, in Death Valley, United States, 1913) were recorded during heat bursts.
Cherokee, Oklahoma, 11 July 1909: at 3:00 in the morning, a heat burst south of Cherokee, Oklahoma reportedly caused the temperature to rise briefly to 57.8 °C (136.0 °F), desiccating crops in the area.
Kopperl, Texas, United States, 1960: A heat burst sent the air temperature to near 140 °F (60 °C), supposedly causing cotton crops to become desiccated and drying out vegetation.
Lisbon, Portugal, 6 July 1949: A heat burst reportedly drove the air temperature from 38 to 70 °C (100.4 to 158.0 °F) within two minutes, in the region of Figueira da Foz and Coimbra, in central Portugal.
Abadan, Iran, June 1967: An extreme temperature of 86.7 °C (188.1 °F) was recorded during a heat burst.
Shortly after midnight on June 15, 1960, a freak meteorological phenomenon struck the community when a dying thunderstorm collapsed over Kopperl. The storm had rained itself out, and with little to no precipitation to cool the resulting downdrafts, superheated air was expended upon the community in the form of extremely hot wind gusts of up to 75 MPH. The temperature increased rapidly, peaking near 140° Fahrenheit (60° Celsius); twenty degrees above the official all-time high for the state of Texas. The storm, known as "Satan's Storm" by locals, soon became part of local folklore.
On 11 July 1909, at 3:00 in the morning, a heat burst south of Cherokee reportedly caused the temperature to rise briefly to 136 °F (57.8 °C), desiccating crops in the area.