Sad, but blame can be spread out.
I learned a lot when I got CTSP,,there are things that can and will put the employer liable.
I think smaller tree company's cut a lot of corner's without knowing it, (may be not, they just do not know OSHA law), in trade for production, I know because I climbed for 28 years with them all over.
I am in the field with all my crews and we have brutal day's in so-cal often.
On those day's, I will show up with a lot of cold water and gatorade, shut the job down for a while and production is not on my mind as a priority.
We have a jobs on a day with temp's over 100 degrees and I pull up on the job and I see all the guy's sitting in the trucks with the air conditioner on high and relaxing ,,I love it,,
An employer must care, his managers must care, and all employee's must be trained to care,,,,
Lot of comma's
Jeff