President Donald Trump had originally announced the raids would happen in late June but postponed them saying it would give Republicans and Democrats time to work out a solution to the problem at the Southern Border.
It has sparked outrage and concern among immigrant-rights advocates and lawmakers.
Know Your Rights guides were posted in various languages on Facebook by the ACLU ahead of the planned operations.
The L.A. County Office of Immigrant Affairs also provided the following list of rights:
-RIGHT TO NOT OPEN YOUR DOOR unless the immigration agent knocking has a warrant to enter that is signed by a judge or magistrate and has your name on it.
-RIGHT TO REMAIN SILENT and not answer questions from immigration agents.
-RIGHT NOT TO SIGN ANY PAPERS without first talking to an attorney.
-RIGHT TO TALK TO AN ATTORNEY at your own expense.
-IF YOU ARE OUTSIDE YOUR HOME: Ask the immigration agent if you are free to go. If they say yes, leave peacefully. If they say no, ask to call your attorney.
Visit oia.lacounty.gov for more information.
The Associated Press contributed to this report.