The lease will definitely determine liability. Recent court cases have determined that a tenant is considered an additional insured on a landlord's insurance policy and covered by it unless the lease provides otherwise. The rationale is that premiums were included as part of the rent. However, if the lease specifically says that the landlord's insurance does not cover the tenant, then the tenant may be liable to the insurance company for subrogation purposes. If the tenant, or guest, caused the fire, as you describe here, that may also raise additional liability and coverage issues. This might not be covered by an insurance policy, leaving you liable for the damages caused. If you have renters insurance, that may help.
Answered on May 11th, 2016 at 6:33 PM