RAIN FELL in the Pacific Northwest and South early Wednesday and a cold front was bringing frosty temperatures to New England, but most other U.S. areas basked in warm weather. . . . FRANCE'S FIRST nuclear test in the South Pacific in 1991 was detected Wednesday, generating protests from the Australian and New Zealand governments. . . . A MALAYSIAN fireworks factory where an explosion killed at least 21 people was operating illegally, an official said.