The short answer is no. You’re at the mercy of the elements and it would be extremely difficult to prove any kind of negligence. All snow was pretty much melted by early morning and it’s very easy for a landlord to say “plow/landscaper hasn’t gotten there yet”.

You’d be doing everyone a favor by doing it yourself on days like today where there wasn’t much need for professional company to come out as it was cleared by 9:00 due to weather. I’m sure most landlords will spring for a $29 bucket of rock salt.