No. However, you may presume that The Left will rain down holy hell on Allstate and Allstate will buckle.
Allstate can't afford to buckle. It would be a terrible precedent, for the industry and also, in my opinion, for the rule of law in our country.
It is a basic constitutional principle, which relies on British common law tradition going back to Magna Carta, that it is TYRANNICAL to change the law ex post facto. If you have a contract or solemn agreement, you can't change it later just because it's convenient for you.
My insurance company specifically excludes flood coverage from my home policy in very large type, and I imagine Allstate does too. It offers to arrange flood coverage through another insurer, but only for an extra fee. You get what you pay for. You honor the contract you sign. Otherwise the rule of law goes up in smoke.