 Heat advisory in effect for much of the region through 9 p.m. Wednesday. Air quality alert in effect today for just about the whole region, too. Sunshine, chance of afternoon showers, thunderstorms today low to mid-90s. Heat index up near 100. Support for NPR comes from NPR stations. Other contributors include the Skoll Foundation, dedicated to powering social innovators to transform the world. Learn more at skoll.org.