Here’s what a heat dome is, how it’s different from a heat wave and how hot it has to get for each region of Florida to issue a heat advisory.

Central Florida will feel another wave of intense heat on Wednesday. A heat advisory will be in effect from 12 p.m. to 7 p.m. for all of Central Florida. That is why WESH 2's First Warning Weather team has declared Impact Weather. Showers and storms will develop this afternoon and evening, with a 40% chance of coverage.

This extreme heat comes as the federal government proposes to rollback vehicle pollution standards, and rescind a key scientific finding on greenhouse gases being a threat to public health.