Your count variables ($match_count, etc.) are declared inside the foreach loop, yet you try to print them outside. I suggest you declare them before the outer while loop and then:

$match_count +=()=($line=~/Memphis/g);
$actris_count+=()=($line=~/ACTRIS/g);
$sef_count   +=()=($line=~/South East Florida/g);
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Not sure what the trailing block { } is after the last one, bad copy/paste?

Oh, and the chomp will chomp $_ by default, you probably mean chomp($line) although it does not actually seem to be needed here.

Update: ...and you are missing a closedir(DIR); after the while loop.