Read that exactly WHERE?

To my knowldge, the ONLY blanket extension is for Texas.

AND, I subscribe (so should you...) to the IRS Quick Alerts.

There is not a checkbox to indicate the return is impacted. The IRS uses the addresses to determine if the return was in an impacted zone. 

For the most up to date information on disaster deadlines, see: IRS announces extensions and tax relief for victims of Texas winter storms. 

That post will be updated with more information as it becomes available.