This is 3 hours old, but it is notable that this is the second full closure of Carbon Canyon Road in the last few days:
March 23, 2023 6:42 AM
Carbon Canyon Road (SR142) is Closed - Resident Access Only on Chino Hills Side
Carbon Canyon Road (SR142) is closed from Chino Hills Parkway to Hillside Drive/Rosemary Lane due to a traffic collision and vehicle fire on the Brea Side.
This is a hard closure for commuters, who need to seek an alternate route. Residents who live in the Canyon are being allowed access up to the County line.
On the Brea side the closure for both directions is from Olinda to Rosemary Lane/Hillside Drive. Until further notice.
For a brief update, see: https://ktla.com/news/local-news/death-investigation-underway-after-burned-truck-discovered-off-brea-road/.
The site looks to be where the La Vida Mineral Springs used to operate on the north side of SR 142 just east of Olinda Village.