Stephanie Pullman, 72, died after her power was shut off over a $51 late bill.
Pullman's death in 2018 led to changes in how power companies deal with overdue bills in the summer.
A recent heatwave in Arizona has the governor asking power companies to put policies in writing.
The medical examiner's office said Pullman died from "environmental heat exposure " combined with cardiovascular disease after the shutoff.
Electric utilities can choose to pause disconnections from June 1 through October 15 or pause them on days forecasted to be above 95 degrees Fahrenheit or below 32 degrees Fahrenheit.
Persons:
Stephanie Pullman, Stacey Champion, Pullman, Patrick T, Fallon, Katie Hobbs
Organizations:
Service, Arizona Public Service, Getty, Arizona Corporation Commission, APS, Tucson Electric Power, ACC, National Weather Service, Gov
Locations:
Arizona, Wall, Silicon, sweltering Arizona, Phoenix, Mohave, Santa Cruz, Maricopa County, shutoffs