From driverless cars to delivery drones, a new generation of robots is about to revolutionize the way people work, drive and shop. But there is one area where robots are already entrenched and spreading fast: the industrial sector, especially manufacturing and storage.

Robots have long toiled alongside workers in factories and warehouses, where they load boxes with items ordered online, drill and weld car parts, or move food from one conveyor belt to the next.

Now many experts worry about the dangers that robots pose to the humans who work alongside them.

Robots have caused at least 33 workplace deaths and injuries in the United States in the last 30 years, according to data from the Occupational Safety and Health Administration. That may not sound like many, but the number may well understate the perils ahead.

Unlike today’s robots, which generally work in cages, the next generation will have much more autonomy and freedom to move on their own.