WAVERLY, Tenn. (AP) — Search crews worked through shattered homes and tangled debris on Monday, looking for about a dozen people still missing after record-breaking rain sent floodwaters surging through rural Tennessee, killing at least 22 people.

Saturday's flooding took out roads, cellphone towers and telephone lines, leaving people uncertain about whether family and friends survived the unprecedented deluge, with rainfall that more than tripled forecasts and shattered the state record for one-day rainfall. Emergency workers were searching door to door, said Kristi Brown, coordinated school...