Stranded families growing weary and frustrated since a deadly Texas fertilizer plant explosion left them barricaded from their battered homes finally began returning Saturday, but only under a curfew and strict warnings to not wander beyond their own yards. Authorities in West, Texas, gave the much-awaited OK after a nervous morning. Emergency workers had told residents packed in a hotel — waiting for updates about their neighborhood — that leaking gas tanks were causing small fires near the blast site, keeping authorities from lifting blockades.