So, if a terrorist goes into a house, holds a family hostage under gunpoint, he can shelter in place until the heat is fine? Is this how it should work? Please educate me.
Or how about a murderer. Or a bank robber? Or a tax protester? As long as the media issues the panic order on behalf of the government there is just cause to engage in police state actions.
That's a simple case, the terrorist is seen going in (hot pursuit), the terrorist is suspected of being in the house (cop sees something suspicious through a window), the terrorist is tracked to the house by a dog, the house has a broken door lock, etc.
There are thousands of court cases where evidence gathering is upheld for such reasons. The ones that get tossed are when the cop cannot articulate a reason for going into a house. A house to house search makes it clear that none of those cases apply and so evidence would be tossed. The cases are about disallowing evidence to protect criminals or overturn their convictions, not about protecting innocent civilians from illegal searches. But that's mainly because organizations like the ACLU are made up of liberals and could care less about individual rights of law abiding citizens (e.g. they don't recognize the second amendment).