Josh Hoffner

Associated Press

An American Eagle jet is seen through heat ripples as it lands at Sky Harbor International Airport in Phoenix. American Airlines cancelled dozens flights out of Phoenix due to extreme heat.

Heat Brings Unique Challenges to Southwest

When temps near 120-degrees Fahrenheit, airplanes can't take off and second degree burns can come from door handles and steering wheels.

On Monday, March 27, 2017, Uber said it is resuming its self-driving car program in Arizona and Pittsburgh after it was suspended following a crash over the weekend. The company had also grounded self-driving cars in San Francisco over the weekend but they resumed operating earlier on Monday. The company said that it paused the operations over the weekend to better understand what happened in Arizona, but feels confident in returning the cars to the road.

Self-Driving Car Crash Regulations

The recent crash was a stark reminder of the challenges surrounding autonomous vehicles.