 We are right in the middle of this three- or four-day heat wave. Officially, the excessive heat warning lasts until late tomorrow evening, or about 8 o'clock tomorrow, we should say. In the meantime, we have another day of temperatures reaching the 90s before a bit of a cool down as we head toward the late part of the week. Late today, there is the potential, although we have a lot of sunshine around, of a shower or a gusty thunderstorm.