Real Estate Law
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I am terribly sorry to hear this. You can certainly request they provide temporary accommodations while the problem is addressed. You also have the right to withhold rent so that you can repair the issue itself. Landlords are required to provide a habitable and safe premises for the tenant. You also have the opportunity to abandon if the mold issue is so severe.
Here is a great resource for you to use not only in this case but going forward. You may have a claim against the Landlord because there is a certain handbook he should have given you when there is a mold problem.