Skin cancer is a thing for people (such as cyclists) who spend a lot of time outdoors. But first, allow me the opportunity to inform you that the second San Francisco Bay Area Spare the Air Alert of 2015 has been announced for Wednesday, July 29, 2015. Ozone concentrations will be especially high in the Santa Clara Valley (again), and the inland areas of the East Bay. Although today’s air quality along the Pacific Coast rates as “Good” today, the Bay Area Air Quality Management District forecasts unhealthy levels of ozone for the entire Bay Area tomorrow. You’re encouraged to limit your driving to help keep smog levels down.

Now, let’s talk about this map, which shows the UV Index forecast for select cities.

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