First Alert Weather Days have been declared for today through Wednesday with a dangerous heat dome building across Alabama and bringing the hottest days we have seen thus far this summer.

The Florida Peninsula and the western tip of the Panhandle could see heat index values between 105 to 110 degrees, which may end up being conservative estimates. High temperatures in Santa Rosa County are currently forecast to hit triple digits starting on Monday. Escambia County highs aren’t far behind them.

The ‘heat dome’ is expected to generate triple-digit temperatures in the Midlands for several days in a row soon, the National Weather Service says. Here’s what to know.

The blast of heat prompted advisories across much of Massachusetts, Rhode Island, Connecticut, and in Southern New Hampshire and Maine.

Summer heat just got turned up a notch − and trapped under a lid. About 100 million people will see 100-degree days the rest of the week.

Around 100 million people are under heat alerts Friday, from coastal Maine to South Carolina and across much of the Midwest and lower Ohio Valley into the Mid-South. Additional alerts are likely in the Southeast as temperatures rise in coming days.

We have been tracking another round of isolated storms this evening. Some of these have brought heavy rain to some areas around the region. Friday: The “cooler” weather is still on tap for the end of the work week.