Temperatures in Arizona are expected to reach 100 degrees, with forecasts calling for highs around 100 degrees later this week. This is a significant increase from last year's mild temperatures, with highs typically in the upper 70s to low 80s. The National Weather Service has issued heat warnings for parts of the state, with temperatures reaching triple digits. The seven-day forecast for Phoenix Sky Harbor is expected to be sunny, with a high near 95 degrees during the day, followed by clear conditions at night.