There are no screamers on day 1 as you light your first campfire. Stop making stuff up or report a bug as Riamus said. Becoming pathetic.
I can attest that this DID happen on day 1 because I play on the same server it happened on. Just because it's never happened to YOU doesn't mean it can't and did happen.
Personally, I think it's time for Screamers to be reverted back to how they were before the update. I don't recall anybody ever saying "You know, Screamers are too easy. I think they need to be buffed so if the player even farts, that'll create enough heat for them to show up."
If this change was made to up the difficulty and/or add more challenge, I'm sorry to say it has bellyflopped hard for me as a player. The Screamer change has made me NOT want to do the things that I know will bring them, especially with the cooldown between their summonings being non-existent now, because I don't want to deal with the artificial headache it brings.
Want to get water? Skip the obvious taking it from a body of water to boil and store. Nope. Go make this device that drip feeds you water and, for some bizarre reason, generates a lot of heat. So much so that having more than 2 collectors in the same area is a good way to ensure Screamers will show up on a routine basis.
Want to cook? Better make sure those dew collector are full and not generating heat before you do so, AND you better not cook for an extended period of time or else Screamin' Mimi and her sisters will show up.
Want to forge? Better make sure the dew collectors are full and you run nothing else but that one forge. Hell, with as long as it takes for the forge to smelt materials and create them, running it for a certain amount of time (just like a campfire) will reward the player with multiple Screamers.
Want to mine? Better make sure it's only coal or nitrate and not iron or lead. Ten hits in on either of those will guarantee Screamers. And since there's no cooldown on their summonings anymore, the player can look forward to new Screamers showing up as soon as they return to mining after killing the previous batch.
All of the above are instances I've been in personally and have gotten these results. If nothing else, players should be allowed to control how much heat is needed before a Screamer will show up, just like how they can control feral sense, zombie movement speed, and block damage. If not, then it looks like it's time to find a mod that reverts Screamers back to their original state or deletes them from the game entirely.