Tenants breach contract - (DFW)

[Mike H.]

Dear BP community,

I have a question regards tenants breach contract case in the DFW (Texas) area and seeking for your advice/knowledge sharing.  I have received a letter from tenants state that they are terminating the lease due to safety concern.  Apparently there was a break-in incident happened in February 2014 that made them worry about the neighborhood and decide to move out before the end of lease.  My question is: can safety concern becomes a legal reason to breach the contract?

Thanks

Mike