CALCUTTA, India, Dec. 12— Rescue boats sailed through the coastal waters of southwestern Bangladesh and eastern India today in the aftermath of a typhoon Friday that wrecked homes, uprooted trees, knocked out power lines and communications and destroyed crops in parts of Bangladesh, West Bengal and Orissa.

Winds gusted to 100 miles per hour during the storm and created five-foot waves. Twenty-seven people were reportedly killed in West Bengal.