The heat is on.

Today will be mostly sunny and 87 with west southwest wind at 5-9 mph this morning. We have a 20 percent chance of showers and thunderstorms after 2 p.m. An isolated storm could become severe, with strong winds, frequent lightning and small hail possible.

The air quality remains at code yellow for today, Saturday and Sunday with particle pollution and ozone. Increased heat and humidity can affect air quality.

Tonight will also have a 20 percent of isolated showers and thunderstorms, before 9 p.m. It will be mostly clear and 65, with west southwest wind around 6 mph calming after midnight.

Saturday will be sunny and 89, with south wind around 5 mph in the afternoon. The low will be 67, with partly cloudy skies.

Sunday will be sunny and 86, with south southwest wind at 3-8 mph. Sunday night will be mostly clear and 66.

Monday will be mostly sunny and 84, with a 30 percent chance of showers and thunderstorms after 5 p.m. It will be a partly cloudy night, with a low of 65.

Tuesday will be sunny and 86, with a mostly clear night and a low of 64.

Wednesday’s high will be 89, with more sun. The low will be 68.

And Thursday, we break 90, with a high of 91 and sunny skies.