The INDI driver of astrolink has the information of the environment (temperature, humidity, dew).
How can I use this information to control the mount or have it generate alarms?
Can I use a weather watcher or similar?
You can use it along with INDI Watchdog driver to execute shutdown. There is also weather alert sound in KStars that can be triggered by this. Unfortunately, Ekos does not have yet an advanced weather alarm management.