1.   As core temperature starts to fall, self-regulating mechanisms start to restore equilibrium.

2.   As temperatures start to dip, oil analysts are getting nervous about industry heating oil inventories that are running well below year-ago levels.

3.   But Phoenix-area temperatures are starting their ominous annual ascent.

4.   But several plants, like cymbidium orchids and Christmas and Thanksgiving cactuses, depend on cooler temperatures to start their flower bud formation.

5.   But with the sun, the track temperature starts climbing again.

6.   In most parts of the United States, average temperatures have started to rise.

7.   In most parts of the northern United States, average temperatures start to rise this week.

8.   It was late afternoon during the time when it seems the temperature should start dropping but is actually the hottest part of the day.

9.   Summer is a hot time for the studios, which roll out their blockbusters as soon as temperatures start to sizzle.

10.   The season is now in high gear in Palm Springs, and lasts until Memorial Day, when the desert temperatures start climbing.