Turn on firesystem | Chapter 9 - Militarized Zone DI Riptide Guide
Last update: 11 May 2016
Look for supplies and open door. In the next room you find a single mutated scientist; eliminating him shouldn't be problematic.
Beware of Infested which will run at you. There is also a one new Thug there. You can pass him or kill - for the latter one, use a firearm. Don't spare bullets, you'll find plenty of ammo boxes in this building.
Resume walking and get to the new door leading to flaming room. Beware of zombies from this area, as they can rush at you and cause additional fire damage.
Finish exploration of this area, and watch out for the single Walker on the ground. The firesystem console is on the screen above.