see you welcome to "world news tonight." dozens of wildfires raging at this hour. thousands of people evacuated. one firefighter losing his life. california in a state of emergency. a scare in the skies. two passenger planes about to land coming dangerously close to drones. >> about 100 feet below us. just off the right wing. >> the new message from homeland security to police around the country. the fda warning about a medical device in nearly every hospital. an iv part that hackers could target? >> security in health care is a cold war. and take a look. these construction crews, panhandlers and highway workers are not what they seem. they are undercover cops. why they're wearing disguises to

keep you safe. good evening. and thank you for joining us on this saturday. we begin with those raging wildfires. tonight, the danger so high, california's governor declaring a state of emergency. this fire right here, the rocky fire, burning 18,000 acres so flames taller than the homes they threaten. nearly 9,000 firefighters on the front lines. and now, one of them, a husband and a father, paying the he was killed in the line of duty. 24 fires burning in california alone. but tonight, there are fires burning in eight states across the country. flames fueled by hot, dry conditions. the forecast in a moment, but first, abc's kayna whitworth leads us off from the hot zone. >> reporter: two dozen large fires now burning across california, sparked by lightning strikes igniting dry ground. conditions so treacherous, they claimed the life of david ruhl, a 38-year-old firefighter who vanished in the flames thursday.

he became trapped after the fire changed direction because of the erratic winds. >> because of the drought-stricken vegetation, accompanied by the steep terrain and winds, we're seeing fire activity that's abnormal for this time of year. >> reporter: dry lightning is the cause of most of these fires. since thursday, more than 400 lightning strikes reported in three northern california counties sparking at least 60 small fires in the region. 91,000 acres have burned so far. that's over 142 square miles, or an area roughly the size of denver. those nearly 9,000 firefighters are now battling these flames. the biggest fire is the rocky fire near sacramento. only 5% contained, and has forced at least 650 people to evacuate. >> it's like being in another world. it's the smells, the embers. i mean, it's still burning here. >> reporter: governor jerry brown declared a state of emergency for california on friday. that means the national guard has been called in to help

firefighting forces already stretched thin. >> as we look at the amount of fires started due to lightning, we have a long road ahead of us. >> reporter: with no rain for relief in sight and very dry conditions in california, these fires are burning extra hot. take a look at this ash that's left over, and it's even scorching rocks in its path. cecilia, these are very dangerous conditions for firefighters. >> they sure are. kayna, thank you. rob's here now. kayna mentioned that dry lightning sparking so many fires. what makes it so dangerous? >> reporter: it's so frustrating, because you get the lightning that starts fires, but gusty winds and you don't get the beneficial rain that can help put out the fires. and here's the setup for that. the big blue dry h in the north. it limits that deep monsoon moisture to the south. anything that streams up north, really, produces the thunderstorms and doesn't produce a whole lot of rain. we have red flag warnings remaining in place across the pacific northwest. look at the heat. just dries up any rain that wants to reach the ground. 95 in portland. we've set all sorts of records for the month of july in both oregon and washington. that's carrying over for the first weekend of august. in the northern plains, minnesota, the southern half of it, potentialdly some damaging

winds with that and some lightning, certainly. chicago in through parts of lower michigan, tomorrow night, i think, is going to be the threat there. heavy rain across north central florida today. tampa seeing over three inches just since this morning and look at that. the future radar shows that rainfall is going to hang over that part of the state right through tomorrow. meanwhile, miami could use more rain, they're not going to get a whole lot. >> they sure do need it. rob, thank you. and next to a threat we have never before seen. a common medical device found in so many hospital rooms could be vulnerable to a cyber attack. the fda warning hospitals, be on alert for hackers. here's abc's aditi roy. >> reporter: hospitals across the country receiving an unprecedented warning by the fda tonight, that a commonly used medical device may be at risk of getting hacked. the device, has pir are's symbiq infusion pump, is used to deliver medication ss like painkillers and cancer treatments to patients through an iv.

in its warning, the fda says, an unauthorized user with malicious intent could access the pump remotely and modify the dosage it delivers. >> so, every hospital should assume that its devices, if connected to the internet, can be attacked. and so this -- it's an important warning. this is not an isolated incident. >> reporter: hospira says it deployed an update to provide customers with an extra layer of security, until the pump is completely off the market in a few months. a move already in the works before this warning. this new worry over health care hacks comes just after fiat-chrysler issued a voluntary recall of 1.7 million vehicles to install software to prevent >> kill the engine. >> reporter: a vulnerability seen in this demonstration of this jeep. these two cases, showing how the rewards of technology also come with risks. and the fda says there was no specific hacking attempt that prompted this warning, but still says there's a very reel possibility, cecilia, this could happen. >> scary possibility, too.

aditi, thank you. and we turn to politics now. 17 republicans in the race for the white house, and tonight, another democrat maybe on the horizon. joe biden. while the vice president has not indicated whether he will run, an adviser tells our jon karl he is, quote, 90% in. biden has said that he would decide by the end of summer. next to africa, and new questions about another famous lion. jericho, seen here on the left, is the brother of cecil, there on the right. cecil, of course, is the lion whose killing by an american dentist last month sparked international outrage. and tonight, there are fears for his brother, too. here now, abc's fill len mena with the later. >> reporter: tonight, conflicting reports from zimbabwe, that cecil's brother, jericho, may have been shot and killed. jericho protecting cecil's cubs after his death one month ago. the news comes as cecil the lion's killer, american dr. walter palmer, faces

increasing scrutiny. he hasn't been seen since closing his minnesota dental office five days ago. protesters now joined by zimbabwe's environment minister, calling for dr. palmer to return there to answer for the killing of its most famous lion. >> the processes have started and we are looking forward for his extradition. >> reporter: even if dr. palmer isn't extradited, experts say a u.s. law called the lacey act could spell trouble for him here at home. >> the lacey act allows the justice department to bring a criminal prosecution against people who have imported animals that they have taken in violation of a foreign nation's law. imprisonment is a possible penalty. >> reporter: big game hunting is big business. just last year, a texas man paid $350,000 to hunt a black rhinoceros in that anybody ya. money reportedly used for conversation. authorities in zimbabwe tonight now suspending big game hunting in the area where cecil was killed. phillip mena, abc news, new york.

and now, to some frightening close calls in the air here in new york. two different flights landing at jfk airport coming within mere feet of drones. flying where they should not have been. pilots seeing drones in the sky virtually every day. the risk of colliding with one of them growing, too. here now, abc's marcy gonzales. >> reporter: tonight, after two close-calls with drones in the most crowded airspace in the country, aviation experts sounding the alarm. >> sooner or later, we're going to lose an airplane due to a collision. >> reporter: friday, a drone spotted just 100 feet below jetblue flight 1834 from port-au-prince, about to land at new york's jfk airport. >> it was a four-bladed drone, but color or direction, i'm not sure, ma'am. it just popped right underneath our nose. >> reporter: just more than two hours later, in the same area, again, a drone coming dangerously close. this time, to delta flight 407 from orlando on its final approach. >> what altitude would you say

that was? >> i would say probably about 100 feet below us, just off the right wing. >> reporter: no one was hurt and investigators don't suspect foul play. but the serious concerns about drones, highlighted again friday by the department of homeland security, telling law enforcement agencies, "we cannot rule out that ed ated a verve tears in the homeland would be able to use these to support illicit or violent activities." another potential being carefully watched tonight as the nypd tries to track down whoever was behind the close calls here at jfk. officials saying finding drone operators especially in a crowded city can be incredibly difficult. cecilia? >> marty, marcy, thank you. and another airplane headline tonight. the wing part suspected of belonging to that missing malaysian airlines jet is now in a lab for analysis. a team of international investigators hoping something on that piece of metal may finally reveal what happened to flight 370. abc's alex marquardt reports in from reunion island, where they

found that mystery part. >> reporter: tonight, what could be the key piece of evidence in the disappearance of mh-370, now in the hands of investigators after arriving in southern france. experts confident that the six-foot long piece of the wing, called the flaperon, that washed up on a beach in the indian ocean, will finally yield some answers as to how the plane went down. >> they can look at how metal bends. how metal breaks. they'll be looking for potential explosive witness marks, anything that might show explosive residue. >> reporter: even before any results come out, officials are increasingly sure this is part of the fatal malaysian airlines plane that disappeared 16 months ago without a trace. >> it's the only 777 unaccounted for, so, it would seem most likely that this is part of that plane. >> reporter: so far, no other pieces have turned up, and for now, there is no official search around reunion island. the lack of other parts further fuels the leading theory that the plane was brought down deliberately.

>> almost everybody believes at this point that this was a murder-suicide. >> reporter: tonight, a prayer service was held here by members of the chinese community in support of the victims' families. "we want people to have hope," this man told us. "we want to diminish their suffering." and cecilia, we're told that a team from boeing, as well as investigators from the national transportation safety board, will be traveling from the u.s. to france on tuesday to take part in the analysis of that piece of the wing. truly a global effort to get to the bottom of this mystery. cecilia? >> a global effort is right. alex, thank you. and next to police officers going undercover on america's roads. they're not looking for dangerous drug dealers, but for dangerous drivers, texting behind the wheel. next time you pull up to a construction worker in a hard hat, look closely. here's abc's ron claiborne. >> reporter: in marietta, georgia, a construction worker wanders between cars stopped at

a red light. no one pays him any attention. what they don't realize is he's actually a police officer looking for people texting in their cars. and he found plenty. >> the black lexus, black female driver, texting. holding the phone in his right hand. >> we can get close enough and almost get into the cars and look down into them and see what people are texting and what they're doing on their phones. >> reporter: it's a novel way to attack a growing problem. each year, more than 3,000 people are killed and over 420,000 injured in distracted driver accidents. >> impairment is still a problem but this texting is killing just as many people as drunk drivers. >> reporter: in stamford, connecticut, this officer dressed up in a surveyor's hat and helped nab 85 distracted drivers in just one day. and in san bernardino, california, it would have been easy to miss these very plainly-clothed officers, even though their signs explained exactly why they're there. creative ways to try catch people doing what experts say is as dangerous as driving drunk.

ron claiborne, abc news, new york. well, if you were outside last night, maybe you were lucky enough to see this. a rare blue moon. it only happens once every 2 1/2 years or so. well, you know, once in a blue moon. you've definitely heard the song. blue moon >> reporter: but did you know a blue moon really isn't blue? it's golden orange, glowing red. around the world, people looking up at the night sky, marveling at the sight. the second full moon in a month. up close in kuwait, so close, you can see the craters. you sent us your pictures, too. from farms in alabama to fields in missouri. salt lake city shining. coast to coast, from seattle to the new york skyline, hovering over the nation's capital, even lady liberty saluting.

a moon that may not be truly blue, but it sure is stunning. >> so stunning. and we have much more ahead coming up, before you fire up that grill for dinner. what millions of american families have in their refrigerators now being recalled over a choking hazard. and this. the scare one man found lurking inside his house. it was all caught on camera. how residents and police are now using a cell phone app to catch thieves in the act. when i started at the shelter, i noticed benny right away. i just had to adopt him. he's older so he needs my help all day. when my back pain flared up we both felt it i took tylenol at first but i had to take 6 pills to get through the day. then my friend said "try aleve". just two pills, all day. and now, i'm back for my best bud!

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of your lung function. symbicort is for copd, including chronic bronchitis and emphysema. it should not be taken more than twice a day. symbicort contains formoterol. medicines like formoterol increase the risk of death from asthma problems. symbicort may increase your risk of lung infections, osteoporosis, and some eye problems. you should tell your doctor if you have a heart condition or high blood pressure before taking it. grandfather: symbicort could mean a day with better breathing. watch out, piggies! child giggles doctor: symbicort. breathe better starting within 5 minutes. call or go online to learn more about a free prescription offer. if you can't afford your medication, astrazeneca may be able to help. imagine coming home late at night, finding a strange car in the driveway and your house lights on. what do you do? the first thing one man in utah did was grab his smartphone. as abc's karen travers reports, yes, there is an app for this, too. >> hello? >> reporter: that's a woman

walking into the front door of brian ways' salt lake city home. he's watching her remotely through a security camera. he doesn't know her, but she acts like she knows him. >> brian? >> reporter: the woman later identified as 38-year-old kista dennett, cooperating when police arrive. >> owner says you don't belong in here. step this way. >> okay. >> reporter: forget asking your neighbor to keep an eye on your home while you're away. now there's a wide range of options for a greater sense of security. surveillance systems accessed through a phone or computer. some even have a speaker, allowing this homeowner to yell >> get the [ bleep ] out of my house! i simply told him, hey, you know i can see you. just, please leave my home. >> reporter: it's not just installed security cameras that catch criminals in the act. sometimes thieves are busted after they've fled the scene, smartphones and later accessed through online data storage systems. like this guy, who stole an iphone and accidentally recorded a video of himself. the owner later finding it on

the cloud and turning it over to police. as for brian ways, he's installing another camera in his home. >> it's great, i mean, it's worth every penny. >> reporter: another homeowner taking remote control for more peace of mind. karen travers, abc news, washington. still ahead on "world news tonight," the happy surprise for that new york mets shortstop, proving that there is, after all, crying in baseball. i accept that i'm not 21. i accept i'm not the sprinter i was back in college. i even accept that i live with a higher risk of stroke due to afib, a type of irregular heartbeat, not caused by a heart valve problem. but i won't accept giving it less than my best. so if i can go for something better than warfarin, ...i will. eliquis. eliquis... reduced the risk of stroke better than warfarin, plus it had less major bleeding than warfarin... eliquis had both. that really mattered to me. don't stop taking eliquis unless your doctor tells you to,

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slices. a thin strip of plastic could remain stuck, even after the wrapper is removed, causing some reports of choking. and next, in georgia, no peace for bobbi kristina brown, even now. whitney houston and bobby brown's daughter remembered today, but the tension between her parents' families out in the brown's sister walking out of the funeral, telling reporters the feud between the families is, quote, just getting started. and updating a story we told you about earlier this week. it turns out there is crying in baseball. mets shortstop wilmer flores choking back tears after reports that he was being traded, well, he is staying. and last night, he smacked the game-winning walkoff home run. how is that for vindication? and when we come back, he was a preemie born so tiny, his dad's wedding ring fit around his little foot. tonight, nearly a year later, look at him now. the miracle baby and his two

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live the regular life. phillips'. finally, a little boy born so premature, he weighed just over a pound. tonight, he is finally home and it took a village and a full year to get him there. here's john donvan. >> reporter: and so he rolls, his mom providing the push power. trevor frolick, who at the age of nearly 1 has never been home before. although, that's where he's headed now.

and that's because, ever since he arrived in this world, in august, that's august 2014, he's born more than 16 weeks early, which is a lot. here's how small he was. that is his dad's wedding ring. trevor weighed just over a pound back then. but the good news, trevor was one of the kids who made it, although not easily. that's why he was 345 days in the hospital. there were times when it was not clear that trevor would live. >> it was hour by hour, minute by minute. >> reporter: but the thing about going home after 345 days, it's not exactly good riddance, glad it's over. because certain attachments were formed. like all of these nurses who came in on their day off to say good-bye to the little guy. they were happy to see him go home, but they also hated to see him leave. >> we're so happy for the family, but yeah, our place is going to feel a whole lot different without him here. >> reporter: and his mom, becky, realizing that she'd been getting a lot of help from this big hospital family. >> i'm nervous. i'm excited.

i'm sure there will be tears. just hope i have what it takes. >> reporter: well, there he goes. and here's the epilogue. trevor's been home a week and all is well. he fits in with his big sister. oh, more news. his mom's expecting. a new baby due in a few weeks. so, enjoy it, trevor, being baby of the family for a little while. and being home for good. john donvan, abc news, washington. >> welcome home, trevor. "gma" and "this week" in the morning. we will see you right back here tomorrow night.