Mexico City , Mexico ( CNN ) -- Heavy flooding in central Mexico in the past week has killed at least 33 people and left thousands homeless , the government said Monday . Schools remained closed in five cities in Mexico 's Michoacan state , where the flooding has killed at least 22 people and left more than 3,500 residents homeless , the state government said on its Web site . Another 83 people still were missing Monday in Michoacan , a state in western coastal Mexico that has been beset by drug violence in the past few years . A mudslide Saturday killed at least 11 people near the small town of Temascaltepec , in neighboring Mexico state . Uncharacteristic heavy rain throughout Mexico also has led to flooding in the nation 's capital , Mexico City . Up to 35,000 people nationwide could have been affected , published reports said . On Sunday , Mexican President Felipe Calderon toured Valle de Chalco , a city in Mexico state . In Valle de Chalco , on the eastern outskirts of the Mexico City area , officials announced that contaminated water from a sewage network that overflowed Friday will continue to flood the town for at least another 48 hours . The number of affected houses in the city grew from 2,000 on Friday to about 3,000 on Monday , the government said . Mexico state is bordered on the west by Michoacan and adjoins Mexico City on three sides -- north , east and west . In Mexico City , officials announced the reopening Monday of 165 of the 174 schools that were closed Friday because of the heavy rain and flooding . Calderon and other Mexican officials have vowed to help displaced families , including offering them food , medicine , shelter and cash allowances to buy new furniture .
Flooding in the last week could have affected up to 35,000 people , reports say . Government : At least 22 people dead and more than 3,500 homeless in Michoacan state . 165 of 174 Mexico City schools that were closed Friday reopened Monday . Comment: