It was a lot cooler than expected and the cloud cover is helping. Because without the sun you don't have as much ozone. But the heat Monday - combined with smoke from fireworks - created the perfect storm for people with respiratory problems.
When the bombs go bursting in air over a long holiday weekend, the air quality goes down, and the calls come in to places like the Baz Allergy, Asthma and Sinus Center.
Dr. Praveen Buddiga said, "We've been busy this morning, seeing a lot of patients with a lot of cough, wheezing."
That's because this year, many families celebrated with fireworks over a stretch of three days. Combine the spike in airborne particulates with the heat and high ozone levels, and its recipe for making symptoms worse.
Jaime Holt said, "We already have a lot of ozone in the air, it's already built up and we have a little bit of a breeze, but it's not enough to clear it out."
The hardest hit are small children and people working outdoors.
Jaime Holt said, "We recommend for people to stay inside."
At least for a few more days, until the smoke from all of the Independence Day celebrations, clears out of the Valley.
Dr. Praveen Buddiga said, "Usually when there's situations like this with fireworks in the air and bad air quality it pushes them over the edge and brings out the asthma."
The air quality is expected to improve in the next couple of days, when a weather system moving in from the coast starts to break up the atmosphere.