PHOENIX -- Today is likely to be the hottest day of the year so far.
Temperatures were at about 100 degrees by 10 a.m. in Phoenix. This afternoon, the mercury is expected to rise to about 112 degrees, which won't break a record, but is a full 10 degrees above average for this time of year.
Clear skies and light winds are expected today and through the weekend.
An Excessive Heat Warning is in effect for the Valley until 8 p.m. tonight.
Over the weekend, the heat will ease up slightly, with afternoon highs expected near 109 Saturday and 107 on Sunday.
Overnight lows will only dip to the upper 70s and low 80s.
Next week doesn't look much cooler with afternoon highs back near 110 by midweek. Still no rain in sight.
The Valley is also under a High Pollution Advisory today for unhealthy levels of ground level ozone.
People with a sensitive respiratory system or asthma may have trouble breathing and are encouraged to limit their time outside today. Everyone can help out by carpooling, refueling after dark and avoiding gas powered lawn equipment. A Health Watch for ozone is possible for Saturday.