More than 100 people were feared dead Wednesday as searchers recovered corpses from a sea of mud spawned by flash floods in northern Thailand, local officials said. Rescue teams in helicopters or on foot tried to reach thousands of people stranded in their houses, on trains and in open terrain devastated by floods triggered by days of heavy rain across several northern provinces, the Associated Press reported. Among the heaviest hit areas was Lablae district of Uttaradit province where dozens of houses were engulfed in mud, their residents trapped within. Others were stranded on the roofs of their houses or in trees. Uttaradit is about 420 kilometers (280 miles) north of Bangkok. Prime Minister Thaksin Shinawatra, who resumed his official duties Tuesday after a seven-week leave of absence, was scheduled to inspect the disaster scene Wednesday.