Tonight’s live update rundown: 1. Excessive Heat Warning continues through Tuesday for NW LA and Deep ETX. A Heat Advisory is in effect elsewhere. 2. Tuesday could be the hottest day of the week with highs in the mid to upper 90s. Heat index values could surpass 110 degrees. 3. Don’t expect much relief from the heat and humidity in the coming week. 4. Most of the ArkLaTex could stay dry for most of the week ahead. 5. Persistence rules in tonight’s 16-day ‘Grain of Salt’ outlook.