Sgt. Jeremy Lewis of the Moore Police Department spoke with MSNBC’s Chris Hayes Monday night about the ongoing search and rescue efforts.

“At the elementary school, we actually still have search and rescue teams in the elementary school. It is a fairly large elementary school, and also the neighborhood around it is completely destroyed, so things, of course, are on top of the rubble that was the school. So that rescue effort is still ongoing with the school,” Lewis said.

“As of right now, we are flooding the areas just trying to locate people who are still trapped either in debris or in their storm cellars. But those guys are going to start getting tired,” he continued, speaking about the rescue teams. He noted that additional resources will likely be needed on Tuesday to continue the recovery efforts.

“Being able to just find where the house was, so that we can locate the storm cellar, is even difficult at this time. And now, with it being dark, we can’t — some of our officers are having trouble that have worked here for 20 years finding different locations of addresses because there’s just not any landmarks,” he said.

—Sasha Belenky