Yes, definitely be careful! If you have a cat it might be best to go with bottom heat and florescent light, and make sure it's absolutely cat proof. A curious cat can spell disaster by knocking over basking lamps, and myriad of other mischievous actions.

The kind of setup I showed you in my video is not good for households with cats. You would need the top screen to be locked down secure and use bottom heat. No heat lamps on top! Otherwise there is a real risk to your household and the snake. Don't underestimate a cat's strength and ability when he is intent on getting to the snake.

Rather than try to keep the cat out of the room, it's best to have a setup where it doesn't matter if the cat gets in.