IMPERIAL COUNTY, Calif. -- A dust bowl is coming, and people here are scared. Aide Munguia-Fulton, a nurse who runs a program for children with asthma, has been seeing referrals for assistance soar as the Salton Sea has receded due to water management schemes and a persistent drought. She knows asthma rates will get worse as more of the salty, toxic lake bed is exposed. "We have to be prepared," she said. "And I know we are not."