In August, a major fire at a Chevron oil refinery in California sent thousands of people to hospitals and forced local residents to hide in their homes with their doors and windows shut. The fire, which sent clouds of black smoke over the San Francisco Bay area, highlights the risks that refineries and chemical plants can pose to local communities and the need for ready access to information that residents can use to protect themselves and their families from chemical disasters.

 Local officials from more than 200 municipalities in 15 states, including city councils, town boards, and county legislatures, have banned natural gas drilling that uses hydraulic fracturing, commonly referred to as fracking. These officials have decided that fracking poses an unacceptable risk to the drinking water, health, and future of their communities. However, state governments and corporations have started legally challenging these efforts, a move that would strip the power of democratically elected local governments to establish quality-of-life protections their constituencies want.