All of a sudden last night my tub filled up with water from the drainage. I do not know where the water is coming from and why. My toilets are also stuck but its filled with only clear water. What can I do to fix this?

Do you live in a condo or a apartment? Are there other units over you? Let me know, Tom

I do live in a condo, and I am in the basement. I have two units over me. Thank you in advance.

You have a blockage in the main under the slab and now you're getting the discharge from the units over you. The more they drain the more water will back up in your unit.
Contact the condo association and let them know that you have a blockage in " The Common Area" and it's flooding your unit.
Common areas are the responsibility of the Association snd the repair should be on them. Good luck, Tom

Thanks for your help. I really appreciate it.