( CNN ) -- As heavy rains raked the Mid-South on Thursday , authorities in Tennessee searched for a 6-year-old boy swept away by floodwaters . Jeremy Heidt of Tennessee Emergency Management said a family of four was stuck in high water in Hickman County . When they got out of their vehicle , the rushing water swept the boy away , he said . Three people died in Tennessee and Arkansas on Thursday in weather-related incidents . In Lawrence County , a 72-year-old man died when he tried to drive across a flooded road and his car was swept downstream and submerged , the Tennessee Highway Patrol said . In Jonesboro , Arkansas , a 74-year-old retired police officer was killed when a tree fell on his house , reported CNN affiliate WMC . In Black Rock , Arkansas , a tree fell on a van and killed a woman inside , said Brandon Morris of the state emergency management agency . Memphis took a hit Thursday from storms that had rolled eastward from the Great Plains . The Memphis Light , Gas and Water 's website said about 42,000 customer lost power at one point due to bad weather . Delta Medical Center was without power and had a gas explosion that caused a two-alarm fire . CNN affiliate WCM , quoting a hospital spokesman , said nobody was injured . The weather caused play to be suspended for several hours at the FedEx St. Jude Classic golf tournament on Thursday , according to the PGA website . Heidt said other Tennessee counties reported weather problems . In Carroll County , some hallways were flooded at Baptist Hospital . Madison County had power outages at the Regional Health Department and its emergency operations center . Lightning knocked out power at the Henderson County 911 Center , forcing authorities to use a backup system . More bad weather is expected Friday in Memphis , with the National Weather Service predicting a 70 % chance of precipitation and up to 2 inches of rain . There 's a 60 % chance in Birmingham , Alabama . CNN meteorologist Sherri Pugh said severe weather could last until Saturday in the South and Great Plains , with heavy rain , hail , damaging wind and flash flooding possible . Isolated tornadoes are possible , too . In parts of Nebraska , people were cleaning up from the hailstorms that struck on Tuesday . As expected , bargain hunters flocked to Woodhouse Family Auto in Blair to buy some of the 4,300 cars damaged by hail , reported CNN affiliate KPTM . The hail smashed car windshields and dented the bodies . Dealership officials estimated the damage at $ 162 million . Car prices were determined on a case-by-case basis , with one buyer saying he picked up a Chrysler 300 with broken windows , a broken door handle and lots of dings for $ 31,000 , reported KPTM . The car normally sells for about $ 54,000 , the buyer said .
NEW : Bridge swept away by floodwaters in Giles County , Tennessee . Motorist in Tennessee drowns trying to cross a flooded road . Falling trees kill two people in Arkansas . Weather knocks out power to 42,000 customers in Kentucky .