I'm guessing that the ambients in LA are close to 100°F.

Around town, an engine temp. of 100°C. is nothing to be concerned about........especially in those temps.

The SD can run all the way up to 98°C. after a highway run and then slowing down for local driving and the ambients here are mid '80s.

You can drive it all day long at 100°C. without any issues, provided that you have a proper coolant ratio and a working expansion tank cap.

Remember, the red zone begins at 120°C..............110°C. is the point where you start to be concerned.