LA CANADA FLINTRIDGE, Calif. - A third powerful Pacific storm pounded California with heavy rain and snow Wednesday, forcing evacuations of hundreds of homes below wildfire-scarred mountains, shutting a major interstate and unleashing lightning strikes on two airliners. Fierce winds howled along the coast and in the mountains, and forecasters warned of rainfall rates as high as 1 1/2 inches an hour on soil already saturated from two days of wild weather that caused street flooding in coastal cities, spawned a damaging tornado and toppled trees, killing two people. Despite stern pleas from authorities and door-to-door calls by police officers and sheriff's deputies, some residents refused to comply with evacuation orders issued for Los Angeles-area foothill communities below the steep San Gabriel Mountains, where 250 square miles of forest burned in a summer wildfire.