dr. guzman is racing against time.cy to save the lives of puerto ricans sweltering in the aftermath. just hanging on by a string? >> i know so. looking for elderly and frail. >> reporter: city on the southeast corner of puerto rico, eye of hurricane maria bore right through here. dr. guzman and team of volunteer doctors are offering medical care to hardest-hit areas of the island. walked through 32 different towns in last three weeks, checking in on storm victims. >> people living on the edge right now. >> reporter: you get emotional about it. >> they're opening their houses to us. we're able to see conditions they're living in. it's impacting for us. >> reporter: hurricane ripped part of the roof off their home, they've received little if any relief and not strong enough to stand in lines for supplies. dr. guzman worries there are hundreds of storm victims not strong enough to survive. do you think the death toll now is accurate? >> i don't think so, we've been through the island. seen the trouble. >> reporter: leads

dr. umberto guzman is racing against time. he is driven to save the lives of puerto ricans in the aftermath. >> we are looking for the elderly, the more frame. >> reporter: we are in a city that city on the water's edge on the southeast corner of puerto rico. the eye of hurricane maria roared right through here. dr. guzman and this team of volunteer doctors are offering medical care to the hardest hit areas of the island. the doctors have walked through 32 different towns in the last three weeks, check anything on storm victims is like irma torres and her husband. >> you get emotional about it? >> yeah. they're opening their houses to us. we're able to see the conditions that they're living in. it is is impacting for us. >> reporter: the hurricane ripped part of the roof off their home. they have received little, if any, relief. they're not strong enough to stand in lines for supplies. dr. guzman worries that across puerto rico there could be hundreds of storm victims not strong enough to survive. do you think the death toll a