Model Number:

So I came home from work & noticed a puddle on the basement floor by the water heater. After further investigation, I found the water heater leaking from the top seam, where the lid goes over the sidewall, & rusty water on the floor behind it. I'm guessing I need to replace it, but I can't do it till next week. Am I in any known danger of it blowing up or just "flooding" my basement? Flooding the basement would suck, but the water heater blowing up could be catastrophically tragic. Any advice?