It's doubtful that a camera on your doorstep is going to be particularly informative about your house fire. :) Though if fire is a concern, fire hardened nase

It's doubtful that a camera on your doorstep is going to be particularly informative about your house fire. :) Though if fire is a concern, fire hardened nases are a thing. If the power is out the camera is out (unless it's on a UPS, in which case the storage can be too...). If the internet is out your cloud storage is out-- this is a problem that a local solution doesn't have.