Can't Smell and Worried About Safety

When I was one, I got a head injury to the temple that would be the only explanation to why I couldn't and still can't smell. Today was the first day I hate that I can't. My house was smoking ready bad from food that was cooking and burning, but I couldn't smell it. I only went out there thinking I wanted a snack why I waited, but then I found nothing but smoke everywhere. Luckily, nothing caught on fire and it could've been so bad. I hate feeling at fault, because I could've done more, but my nonexistent smell was a big reason that happened and could happen again. so my questions are... How can I get better smell for precautionary reasons? Is there more triggering scents that just ignite the power in your nose? or treatments? if not, is there other things that could help me substitute my sense of smell in a way, such as fire detectors. just as a plan b if I can't hear that?