Our reporter, John Branch, joined a team installing cameras in the Sierra Nevada for detecting wildfires. Artificial intelligence is used to sift through images from the network, helping firefighters identify and respond to early to signs of wildfires.

Portuguese Bend in Rancho Palos Verdes, Calif., rests on an active landslide. While some residents have fled, a few new homebuyers are choosing to take a risk and purchase anyway, seeing a rare opportunity to own a piece of Southern California coastal property.