Time to read up on your local snakes and ID the harmless ones.
Pretty good rule of thumb: the venomous ones usually don't climb.
There's no good way to keep the snakes away, so its best to know when to be careful and when you can disregard it.
I lost 5 one-week-old chicks out of my outdoor brooder last year to a very large King snake. I ALWAYS watch for snakes around my yard, we have a lot of them all year long since it never really gets cold here.
After last year, my first year with birds, we now have a waiting list for snakes for adoption. Nothing weirder last year than driving around with a 5 ft black snake in a pillow case.
I live in central Kentucky, where the weather hasn't even been particularly warm these past few days, and my husband has already found two young snakes, one inside of our shed and another making its way towards the coop. A neighbor of mine killed a 3 and a half foot long snake just outside of his barn the other day, and the weather down here has been 65 degrees tops, on good days, and actually pretty cold at night.
My father-in-law thinks it will be snake overload this summer, if they're already popping up this frequently in my area already. Which is exactly what I wanted to hear since there's nothing else on Earth that creeps me out more.