Good morning everyone, Attached is our updated weather briefing regarding the heatwave. The main change with this update is that the Heat Advisory has been expanded to include all of Southern New England except for areas towards the south coast and east slopes of the Berkshires. In addition, we are now forecasting heat index values 100-104F on Monday/Tuesday so there is a small chance that an Excessive Heat Warning may eventually be warranted for some locales if heat index values reach 105F. We have attached the following: 1. Maximum heat index/apparent temperature values for Sunday through Tuesday. 2. One-pager briefing. Our next update will be by 6 PM today. Thank you, Rodney Chai and Hayden Frank If you have any questions or would like more information, don't hesitate to contact us via this email address, on NWSChat <https://nwschat.weather.gov/>, or at the following: National Weather Service Boston/Norton, MA 46 Commerce Way Norton, MA 02766 508.622.3280 Website <http://www.weather.gov/boston> | Facebook <http://www.facebook.com/NWSBoston> | Twitter <http://www.twitter.com/NWSBoston>