It’s going to be a dangerous summer. Just a day after firefighters managed to battle back fires in a 700-acre area near San Diego, a second wave of nearby blazes filled the sky with black smoke and triggered at least 11,000 evacuations in Carlsbad. Schools are closed in several San Diego County districts, and a local college in San Marcos has been evacuated in the middle of finals. County officials have declared an emergency and are appealing to the state to provide support for the overwhelmed firefighters. The military and some 120 deputy sheriffs have been mobilized.