High pressure will strengthen through early this week bringing above-normal temperatures for our first week of fall. Record highs are possible in many areas today and tomorrow where an excessive heat warning is in effect. Locally, temperatures will be much more comfortable with highs generally running 5 degrees above average. The threat of thunderstorms is also done with for a couple of days as a drier, more stable environment settles into the region. That will bring us mostly sunny skies out there today with highs in the upper 70's, we could have a few locations hit the 80-degree mark. We'll also see a few afternoon clouds with light and variable winds to around 10mph. Clear skies tonight and mild with lows in the 40's. Tomorrow should pretty much be a repeat of today under mostly clear skies with highs in the upper 70's. High pressure will weaken during the second half of the week as a trough approaches the west coast. This will bring a gradual cooling trend as highs drop from the upper 70's to around 70 degrees by the weekend. As this ridge shifts east there may also be a temporary influx in upper-level moisture Wednesday that could spark an afternoon shower or thunderstorm. Otherwise, dry and cooler headed into October!