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As a storm dumped up to 10 inches of rain in parts of New Orleans on Aug. 5 -- later revealing major problems with the city’s drainage system -- many residents placed 911 calls to report the flooding.

In his most recent update on Sunday, Mayor Mitch Landrieu said the city’s drainage system has “never been fully operational” and that it could take as long as two weeks to “stabilize” the crippled system with emergency generators and other fixes. As a result, large parts of the city remain vulnerable to heavy rain or a tropical storm.

See a heat map of the 911 calls from Aug. 5 below, which shows an influx of reported flooding in the Mid-City and Lakeview areas, some of the hardest-hit neighborhoods.

Can't see map below? Click here.