Fire, flood or other destruction - landlord's responsibilities

[Mary Joe]

I am sorry if this has been answered or discussed before but i can't seem to be able to find the answers.

Does anyone know what are landlords' responsibilities when, for example, a fire breaks out in units where the tenants have signed a one year lease? It doesn't have to be a fire, it can be any incidents or major catastrophe that render the house uninhabitable and assuming that it is not the tenant's fault.

Do landlords have the responsibility to find temporary housing for the tenants? What if the tenants do not like the temporary housing that the landlord finds? Can the tenants find temporary housing on their own and the landlord reimburse all costs involved?

I suppose the tenants can sue for breach of contract under these circumstances, am I correct?