 eastern great lakes and even the northeast where high pressure will provide a significant influence it will remain hot in the southern plains with highs in the 90s and 100s and then drop into the 70s and 80s as you approach the great lakes and northeast meanwhile the west will remain dry and it will become hot again in the afternoon through parts of california into the southwest this will be a part of a major heat wave developing through the rest of the holiday week into the weekend