I haven't done a lot of reading on self driving cars. No more than the occasional article on here. Do they have plans for cars that can operate in all weather

I haven't done a lot of reading on self driving cars. No more than the occasional article on here. Do they have plans for cars that can operate in all weather conditions? I mean I never noticed if they ever said that the cars were only for mild weather areas. This was before I started thinking about the unknown variables that cause accidents: deer, a tire exploding, other debris (nails, glass, etc), some manufacturer or software bug. It's all too easy to imagine the software doing quite unexpected things when it gets to an unknown. Even if you could take control of the car I imagine most people wouldn't be paying attention to actually do it. This is just my panicky train of thought though. The tech is cool.