Thousands of people are expected to return to New Orleans this week, as areas of the city are opened up to residents.
It's currently predicted that within the next month at least several dozens of people will return to New Orleans
It's definitely correct because the context states that it's expected that thousands will return this week, thousands is definitely "at least"  several dozens"  and this week is within the next month
( z1 predict :ARG1 ( z2 return :ARG1 ( z3 person :quant ( z4 at-least :op ( z5 several :op 12 ) ) ) :ARG4 ( z6 city :name ( z7 name :op "New" :op "Orleans" ) ) :time ( z8 after :op ( z9 now ) :quant ( z10 up-to :op ( z11 temporal-quantity :quant 1 :unit ( z12 month ) ) ) ) ) )