I know you already pulled them in but my main concern would be that the heat plate might not work reliably down in the 30s unless the instructions specify it can.
People have brooded outdoors down in the 20s. Not ideal but as long as the heat source is in a dry and draft free spot, and the chicks understand how to use their heat source as needed, they should be okay. But since they're so young it didn't hurt to be extra cautious since 2 day olds may not be reliable in finding their way back to heat if they should stray from it.
People have brooded outdoors down in the 20s. Not ideal but as long as the heat source is in a dry and draft free spot, and the chicks understand how to use their heat source as needed, they should be okay. But since they're so young it didn't hurt to be extra cautious since 2 day olds may not be reliable in finding their way back to heat if they should stray from it.