The heat wave begins today, with a high of 92 under mostly sunny skies. We have a 20 percent chance of showers and thunderstorms after 3 p.m.

We have a Code Yellow air quality day, moderate air quality. Unusually sensitive people, such as those with asthma may be affected.

Tonight’s low will be 71 with calm wind and partly cloudy skies.

Thursday’s high will be 95, with sunny skies and a light west northwest wind. The low will be 72 with calm wind. It will be a Code Orange air quality day, unhealthy for sensitive groups. Children, active adults, and those with heart or respiratory disease including asthma, should limit outdoor activity.

Expect a heat advisory for Friday, with a high of 97. The heat index could be as high as 110. It will be mostly sunny with light west wind. The low of 75 won’t be much relief.

Saturday will likely also have a heat index in the 100s, with a high of 96 under mostly sunny skies. The low will be 75 again.

Sunday’s high is expected to be 94, with mostly sunny skies and a 30 percent chance of showers and thunderstorms after 11 a.m. The same chance of rain continues Sunday night with a low of 74.

The high Monday will be 92, with a 30 percent chance of showers and thunderstorms. It will be partly sunny. The same chance of rain is possible Monday night, with a low of 72.

Tuesday has a 40 percent chance of showers and thunderstorms, with partly sunny skies and a high of 89.