The European record of 118.4F set in Athens, Greece in 1977 may be broken.
More than 90 people died and nearly 200 were injured by the blaze.
Air quality worsened in states as far away as Utah, as smoke from California's 17 wildfires released pollutants into the atmosphere where they can remain for weeks.
It's expected that the fire will continue to spread to the south and east.
The inferno has now claimed at least five lives and hundreds of homes.
The blaze has destroyed about 500 homes, businesses and other structures.
The fire began in the boiler room and was put out, but it reignited a few hours later.
The fire has grown to more than 300 times its original size in only a few days.
The Spring Creek fire in Colorado's Costilla and Huerfano counties has burned 108,045 acres and is 91 percent contained.
Photos posted on social media showed significant smoke rising from the hills above residential areas.
A multi-agency investigation in North Carolina led to arson charges for a number of firefighters.
Nevada officials are asking to speak to anyone with information on the Martin Fire, which grew to nearly 400,000 acres over the weekend.
The Spring Creek Fire, which has been burning for a little over a week, has destroyed more than 130 homes in Colorado.