Labour legislations in all Canadian jurisdictions  give employees the right to refuse dangerous work.
Here are some tools to help you exercise this right when you need to:

Right to refuse dangerous work

Under federal and some provincial labour laws, you have a right to refuse dangerous work, if you have reasonable cause.

Wages and benefits during work refusal

Anyone who must stop work due to the internal complaint process, a work refusal or the direction of a health and safety officer is to be paid until work resumes or until the end of their shift.