The thunderous sound of fireworks — their blasts sudden, deafening and often terrifyingly similar to gunfire — have reverberated throughout the Bay Area in recent weeks. Residents in the big cities and even in the quieter suburbs report the explosions started over Memorial Day weekend and have persisted through June, waking them in the night, interrupting their babies' naps and scaring their pets. Fireworks packaging has been found around Lake Merritt in Oakland, and Nextdoor boards and Twitter are filling up with news of the booms and bangs in San Francisco. "I’m losing my mind," said SF resident J. Barry....