>> axelrod: chaos explodes at trump rallies. a man rushes the stage in ohio. trump supporters clash with demonstrators in chicago. a cbs journalist is handcuffed, charged with resisting arrest. >> i have certainly never seen anything like last night. that was unprecedented. >> axelrod: also tonight, relentless rain has floodwaters rising in the south. a louisiana levee is on the brink. and in the drought-stricken we west, the device designed to make sure when it rains, itt pours. captioning sponsored by cbs this is the "cbs evening news." >> axelrod: good evening. i'm jim axelrod, and this is a western edition of the broadcast. ohio and illinois are among the key states holding primaries

next tuesday. in the past 24 hours, voters in those states got a firsthand look at the chaos that's been erupting around donald trump's presidential campaign. in a moment, we'll hear from the cbs news digital journalist who was caught in the turmoil in chicago last night. but first, dean reynolds shows us what happened at a trump rally in dayton, ohio, today. >> reporter: donald trump rallies are seldom without incident, and today in dayton was no exception. >> i'd do it myself about-- >> whoa, whoa! >> reporter: somebody rushed the stage but was quickly disabiewlingsed of going further by the secret service, which formed a protective cordon around the candidate. >> i was ready for him, but it's much easier if the cops do it. don't we agree? ( cheers and applause ) >> reporter: though he tried to make light of it, the mood at trump rallies has become an issue as big as the rallies themselves. thousands of the protesters jammed an arena and adjoining

streets last night in chicago, confronting trump supporters and causing a cancellation of the whole event. trump said he had consulted the chicago police before scrubbing his speech, but the police says sade no one had talked to them. and is when trump's campaign named a police commander as their security liaison, the commander denied he spoke to anyone. whatever the case, there were a handful of arrests, including cbs news journalist sopan deb, taken into custody for allegedly resisting officers... though video of the incident showed no resistance. this afternoon at his event in cleveland, trump could easily hear hecklers in the crowd, and he suggested they were misbehaving democrats. >> don't worry about them. let them rot. look, it's a bernie person. it's a bernie-- hello, bernie! hey, bernie! get your people in line, bernie! >> reporter: trump blamed organized demonstrators-- he

actually called them thugs -- for his trouble in the windy city and said their attempts to shut down free speech would backfire. >> it just makes all of our friends and supporters more angry. we're going to go to the polls on tuesday, and we're going to be resounding victory, resounding. >> reporter: and, speaking of victory, five states will vote on tuesday, jim, and polls have donald trump either competitive or ahead in all of them, including the primary here in missouri. >> axelrod: thank you, dean. and dean mentioned the incident involving our digital journalist sopan deb. he's been covering trump's campaign since it started last summer, but deb says he's not seen anything like he saw last night. >> back it up! back it up! sopan deb was on the floor of the arena as tensions built, raw emotions on both sides.

>> build those walls! >> axelrod: he interviewed both protesters and trump supporters. >> these people are protesting, and exercising their free speech, and the irony of that is, we don't get to have our side. >> tons of organizations all over the campus got together, had meetings all week to stop this atrocity from happening. >> axelrod: police cleared the pavilion and streets outside were quickly blocked. tensions were high. deb shot video of an arrest. police surrounded a man whose face was bloodied. protesters screamed at police. >> black lives matter! black lives matter! >> axelrod: deb continued to roll as police kept watch. without warning, deb was grabbed from behind and thrown to the ground. >> back up! back up! >> whoa, whoa, whoa, whoa! whoa, bhoa whoa! >> put your hands behind your back! hands behind your back!

>> axelrod: deb says as he was hand custody an officer placed his boot on deb's neck to keep him in place. another news crew captured these images of deb being taken into custody. illinois state police charged him with resisting arrest, although there was no sign of that in either of the videos. on the tape, deb identifies himself as a credentialed member of the news media. >> i have i.d. press cecial. i have press credentials i can show you. >> axelrod: he was placed in the backave police van while his cam rafs left nearby. it was returned to deb after his release. sopan deb says trump's rallies have grown more hostile. >> there have been protests going on at donald trump rallies for months and months and months. this is nothing new. however, there has definitely been a recent uptick. i have certainly never seen anything like last night. that was unprecedented. there have been other groups of

coordinated protests at pastorallies, but nothing as massive as what i saw last night. >> axelrod: you can see sopan deb's full interview tomorrow morning on "face the nation." john dickerson will also speak with donald trump, bernie sanders, and john kasich. today, the presidential candidates, as well as the president himself, spoke about the hostility and violence we've seen at trump rallies lately. here's julianna goldman. >> reporter: donald trump's opponents roundly condemned the escalating violence at the republican front-runner's rallies. >> i still at this moment continue to intend to support the republican nominee, but getting harder every day. >> reporter: marco rubio and john kasich opened the door to not supporting trump if he becomes their party's nominee. >> obviously, look, the protesters last night are not blames, but i think we also have to look at the rhetoric coming from the front-runner in the presidential campaign. >> donald trump has created a toxic environment, and a toxic

has allowed his supporters and those who sometimes seek confrontation to come together in violence. >> reporter: but trump's rivals are walking a rhetorical tightrope. on the one hand, they're trying to hold protesters accountable. on the other hand, they're blame the billionaire businessman for foster a hostile climate and trying to avoid alienating his supporters. >> we've seen some protesters that take speech into intimidation, into violence, into trying to silence anyone who might disagree with them. that is wrong. i think it is also true that any campaign, responsibility begins and ends at the top. >> reporter: some of the protesters last night did confirm to cbs news they are supporters of bernie sanders, and trump tweeted, "it is clinton and sanders people who disrupted my rally in chicago." >> i don't think our supporters are inciting. what our supporters are doing is responding to a candidate who

has in fact, in many ways, encouraged violence. >> reporter: both sander sanderd hillary clinton say it's up to trump to tell his supporters to stand down. >> if you play with matches, you're going to start a fire you can't control. that's not leadership. that's political arson. >> reporter: president obama also weighed in at a fund-raiser today in dallas. jim, he said leaders are those who aspire to be leaders, must reject violence and efforts to spread fear, and he said if they refuse to do that, they don't deserve our support. >> axelrod: julianna goldman covering for us in washington tonight. juliana, thank you. the system that brought torrential rains and historic floods to the south is finally weakening, but flood watches and warnings are posted in at least six states tonight. david begnaud is in bossier city, louisiana. >> reporter: this afternoon, floodwater was seeping through sandbags in bossier city.

crews added more bags in the low-lying vulnerable areas along a levee which protect protects t 3500 homes. the red chute bayou rose seven inches overnight. the house of chris smith and his wife laura backs up to the levee. they were ordered to evacuate but they decided not to. it was a very personal decision. >> i had surgery on monday, to have a hysterectomy to get rid of cervical cancer and i was sales ared not to travel and we made the decision if it got high enough we'd leave but right now we'll stay put. >> reporter: west of here, the lake is expected to rise to 179 feet, flooding not seen in nearly 50 years. sheriff steve prayeder: >> sometimes it's too late to act, so just get your stuff and get gone. >> reporter: across louisiana there is moderate to major flooding on 50% of the state's s bayous and rivers. in fulsome, laurie barrow's

family spent most of friday trying to reach her. they found her trapped in her own home. she lost everything during hurricane katrina. >> it's heartbreaking. it's deja vu. i'm getting older, tireder, and i don't feel like doing this again. >> reporter: back in north louisiana in bossier city, the smith family is ready with sandbags. >> the the red cross called me yesterday and asked if i could help with any disaster in the area. and i told them i have to worry about my own home before i go help others right now. >> reporter: and this is the levee right behind the smith home. the seepage we showed you a moment ago thas stopped. they brought in more sandbags, laid them here, nothing more is flowing across. but you can see the seepage from earlier from the last few hours and those are some of the homes they're worried about. the mayor said don't let the sunshine deceive you. we're not out of the woods just yet. >> axelrod: david begnaud in the devastation of louisiana. thank you very much. it is not the quantity of water but the quality of it that's a problem in newark, new jersey.

this week, water fountains were shut down in city schools due to lead contamination. as jericka duncan reports, evidence suggests officials knew about this problem for years. >> reporter: a moment memo from the district sent on august 30 of 2014 mandates all schools run and flush each water fountain for two minutes daily before school opens. the same steps apply for calf teara faucets prior to food prep usage. and principals were instructed to tell students and staff to run fountains for at least 30 seconds before drinking the water. annual water contamination tests at newark public schools were conducted between december and february. on wednesday, the district turned off water at 30 schools after results revealed unsafe lead levels. >> i send my son to school every day to be safe. this his safe haven and then

lead is in his water. >> reporter: lead in drinking water should not exceed 15 parts per billion. at bard high school, one sample had 558. branch brook elementary, 194, while another elementary school tested at 193. sabrina oliver says her children's school was impacted. >> it's water. i mean, i never thought the water was good in newark anyway, but that's-- that's alarming. >> reporter: health officials say it's not newark's water that's the problem. it's when lead from old pipes and fixtures leach into the water similarly to what happened in flint, michigan. too much lead can damage the nervous system, and young children are most at risk. next week begins a new round of lead testing at all 67 schools in the district. jim, officials say that the newark health clinic is providing free lead testing for children. >> axelrod: jericka, thank you very much. up next, the device that's planting seeds for rain.

and sled dogs attacked at the iditarod when the cbs evening news continues.

>> axelrod: driving rain and high winds continued to batter california today. power was knocked out in ryder county in southern california. up north in mendocino county, a mudslide knocked a caltrans truck down a bank and almost into the ocean. today's storms are providing help with the state's historic drought, but as carter evans reports, after four years of waiting, scientists in california are through relying on nature alone. >> reporter: rainfall like this is so rare in southern california, that los angeles county is hoping to squeeze out every drop by cloud seeding from ground stations like this one. >> there are 10 of these locations throughout the san gabriel mountains. >> reporter: kerjon lee is with the l.a. county department of public works, which is paid a

half a million dollars to a cloud seeding contractor, promising to make more rain. when you say the term "cloud seeding," a lot of people think it's just hocus-pocus. >> well, this actually comes with a lot of science behind it. >> reporter: cloud seeding works when silver iodide particles are sprayed into a saturated cloud, acting like a nucleus that traectses super cooled water vapor that freezes into ice. once the ice becomes heavy enough it falls and becomes rain. graeme stephens studies clouds and weather systems for nasa. does cloud seeding work? >> it's been shown under certain circumstances, it works, by in a very marginal way, and even then it would be difficult to prove how much increase has occurred. >> reporter: l.a. county officials insist they can get up to 15% more rainfall whenw no health risks. do people have to worry that their water systems may be contaminated from cloud seeding? >> cloud seeding is absolutely

safe. >> reporter: how much more water do you think you can get out of the clouds? >> we think we can get an additional 1.5 billion gallons a year. >> reporter: and that would be a welcome sight in southern california's depleted reservoirs. carter evans, cbs news, los angeles. >> axelrod: the new doping scandal involving a drug most americans have never heard of.

>> axelrod: tennis star maria sharapova started her suspension today for using a banned substance, but as jonathan vigliotti reports, sharapova is not the only russian athlete who's used it. >> reporter: a speed skater, weightlifter and volleyball player, all russian, are the latest athlete to test positive for meldonium. russian tennis star maria sharapova made the little-known drug a household name this week when she admitted to using it. >> i made a huge mistake, and i-- i've let my fans down. >> reporter: in a facebook posting friday, she said she didn't know the substance was

banned and promised to fight her suspension. meldonium is a heart medication available over the counter in eastern europe that's known for boosting endurance by increasing blood flow. russian officials were baffled when the the world anti-doping agency banned the drug on january 1. "our main goal is to express disagreement with the including of this drug on the list" said yulia miroshnikova, with russia's federal sports agency. 99 athletes have failed the drug test so far. this latest scandal could not have come at a worse time for russian sports. in november, russia's athletic team was suspended from the 2016 rio summer olympics after being accused of running a state-sponsored doping program. on friday, the international association of athletics federations met to consider reinstating the team. president sebastian coe: >> while progress has been made, the council unanimously agreed that the russian authorities

need to undertake further, significant work to satisfy the reinstatement conditions so rusafs should should not be reinstated at this stage. >> reporter: sharapova says her doctor prescribed meldonium which she took on and off for 10 years. she has found unlikely support from pierce competitor serena williams. >> axelrod: jonathan vigliotti, thank you. still ahead, a cliffhanger ending for homes too close to the edge.

>> axelrod: a riot broke out last night in an alabama prison. inmates recorded it as it was happening. this is the correctional facility in atmor, alabama. a guard and the warden were stabbed before it was over but they're both expected to recover. a preemptive strike today in pacifica, california.

these pictures were taken in january, showing an apartment complex on the verge of falling into the sea due to cliff erosion. rather than let that happen, today, crews began taking the structures down with machinery, reasoning it's just safer that way. a shocking act of sabotage at the iditarod. >> axelrod: that is musher allie zirkle after she and another competitor, jeff king, were repeatedly ambushed by a man on a snowmobile. king's lead dog, nash, was killed. a number of other dogs were injured. a suspect has been arrested. coming up, a growing problem that cities around the world are trying to wipe out.

>> axelrod: we close tonight with a problem that has proven hard to i can suppose of. contessa brewer now on the scourge of the flushable wipe.

>> reporter: in san antonio, they cheered clearing the clog. in australia, a crane pulled out this fatberg, a glob of wipes, grease, and other items. the problem starts here when wipes go from the back of the toilet into it. and 7% of wipes are labeled "flushable." new york city estimates it spends $3 million a year just dealing with wipes in the sewer system. >> whenever you flush is going toned up somewhere. it doesn't just disappear. and the sewage passes through. >> reporter: deputy environmental protection commissioner vincent sapienza showed us the screening process, but it doesn't catch everything. >> wipes are getting into our gear, clogging them up, and then we're not able to process as much wastewater as we normally would. >> reporter: kimberly-clark, a manufacturer of flushable wipes, told cbs news, "our flushable products are thoroughly tested to ensure that they meet the current u.s. industry guidelines for flushability." the industry i.n.d.a. has firm

criteria. wipes have to break down when flushed. but manufacturers' compliance is voluntary. no laws regulate how flushable they are. president dave rousse blames nonflushable wipes for the clogs. >> there is absolutely no evidence presented by anyone at any time that a guideline-compliant wipe flushed down a toilet has caused any damage or any issue anywhere. and it's because they don't. >> reporter: but new york city is not alone. tackling legislation now to regulate flush-away brands. >> our preference is if you're going to use a wipe, that's fine. put it in the trash. >> reporter: that's the bottom line. contessa brewer, cb new york. >> axelrod: and that's the cbs evening news for tonight. later on cbs, "48 hours." a reminder to set your clocks ahead one hour for daylight saving time, which begins at 2:00 a.m. tomorrow morning. i'm jim axelrod in new york and for all of us here at cbs news, thanks for joining us.

and good night. crashing down. eye on the storm, rain is ramping up and wind is sending trees crashing down. we're tracking more rain and this is just one of several waves to come this weekend. demolition begins, but will the weather cooperate for the rest of the tear down? >> kpix news is next. ,, ,,,,,,

live from the cbs bay area studios, this is kpix5 news. now, the latest bay area storm bringing heavy rain to parts of the bay area. another wet weekend and the wind combined with saturated soil is sending trees toppling over and