Somehow, while I was gone tonight, my ceramic heating element got turned off. No idea how this happened, but I got home and his ambient temp is 64.8! How do I warm it up? He is moving, (thank god) and I just got a secondary lamp to plug in, (unfortunately this one gives off light AND heat. I got the element working again (it wasn't unplugged, and the power strip was on???)

Please help. I need quick reptile friendly ways to warm up his tank, that don't require me going to the store (all of which are closed until Friday!)