Be aware of today’s heat index of 100 degrees, and the Code Orange air quality action day. We’ll have a high of 95 under sunny skies and minimal west southwest wind.

Code Orange air days are for ground level ozone approaching unhealthy levels. Children, seniors, active adults and those with heart or lung disease should limit outdoor activity, a good idea anyway with the heat. It is a Code Yellow day, moderate quality, for particle pollution.

A 20 percent chance of showers and thunderstorms develops this evening before 9 p.m. Patchy fog is possible in the early morning hours. The low will be 73 with south southwest wind at 5 mph.

Saturday’s heat index will be as high as 101, with a high near 95 under mostly cloudy skies. A Code Yellow day is predicted for the air quality — affecting unusually sensitive people. There’s a 20 percent chance of showers and thunderstorms after 3 p.m. with southwest wind at 3-8 mph.

Saturday night also has a 20 percent chance of showers and storms before 10 p.m. It will be partly cloudy and 75, with southwest wind around 6 mph.

Sunday begins a string of days with a 30 percent chance of showers and thunderstorms. The rain will be in the late afternoon Sunday, with a high of 94 under mostly cloudy skies. West southwest wind will be at 5-8 mph.

The same chance of showers and storms lingers Sunday night, with a low of 74.

Monday will be partly sunny and 92, with a 30 percent chance of afternoon showers and storms. The low will be 72, with the same chance of rain.

We get a little break in the heat Tuesday, with a high of 88, but will still have a 30 percent chance of showers and thunderstorms in the afternoon.

The same rain chance continues Tuesday night with a low of 69.

Wednesday will be a bit less hot, with a high of 84 under partly sunny skies, and a 30 percent chance of showers and thunderstorms. The low will be 69, with the same chance of rain.

Thursday, too, has a 30 percent chance of showers and thunderstorms, with a high of 87 under mostly sunny skies.