>> we're doing between two to three an hour. >> reporter: two to three an hour? is that quick enough to make the case count go down in the computer? >> so, in new haven, we've averaged about 100 new cases a day. and with our team, we're able to handle that. >> reporter: but there 's no federal requirement for contact tracing leaving states and cities to make plans of their own. >> i think it's important for us to come up with a strategy that says we're not going to try and mitigate the disaster. we're actually going to try and contain the growth of the virus. >> this is an opportunity to go out, find the embers and stomp them out before they become a wildfire. >> exactly right. >> reporter: massachusetts governor charlie baker announced the first statewide contact tracing program last month. it's grown into a thousand-person team, reaching hundreds of patients a day. >> people want to talk about what it means to have this virus. they're looking for help with respect to how they isolate. and they're willing to give us their close contacts which, by the way, so far have not been big numbers. >> reporter: but those numbers are likely to spike as people

return to work. and to stay ahead of the pandemic, america will need an additional 100,000 contact tracers, according to johns hopkins university. by one count, states have hired or announced plans to hire about 66,000 so far. does the lack of a federal standard put your state at risk and surrounding states at risk? >> i certainly think if the feds were to participate, if the feds were to establish, as you say, national standards or some rules around compatibility with respect to one state to another -- because you're right, there is a lot of back and forth between states. and people move. they don't just work, they move. i think that could be very helpful. >> reporter: as more americans test positive for the virus, researchers say confidentiality is key for contact tracing. that means shielding the identity of every covid-positive patient. even from the people they may have infected. contact tracing is critical. virtually nobody disagrees with that.

but out there in the public, there is a concern that the more that the government -- even if it's the health department -- is prying into people's lives and movements, the less privacy we'll have as americans. how do you balance the public health mission with the privacy concerns of citizens? >> i would say we take confidentiality very seriously. that's a big component of what we do as far as not sharing information of who is a positive test result. that is extremely important. but also by notifying people that they may have been exposed, it greatly reduces the spread of the disease. so the more information people can provide, the better and the more effective that this technique will be. >> later this month google and amazon will release a tracing app for your phone. it's supposed to send you an alert if your phone is too close to another phone that may have been near another phone of someone with the virus. we'll keep you posted on that. hard-hit parts of the rest of the world have also begun easing virus restrictions. holly williams has the story

from istanbul, turkey. >> reporter: barber shops in turkey were forced to close their doors seven waltrimmed. he welcomed back his customers, some a little hairier than usual. >> i'm so happy. >> reporter: france will end its two-month lock down, and citizens able to go outside without filling out a form. meanwhile in some parts of spain, outdoor restaurants and bars will start serving customers today. >> no, this is not the time simply to end the lock down this week. >> reporter: but in the igea i europe, over 30,000 lives and a prime minister who himself caught the virus, things will take much longer. construction and manufacturing workers can now go back to their jobs, but schools and the

hospitality industry will have to wait until this summer. >> we must have a world-beating system for testing potential victims, and for tracing their contacts so that all told, we are testing literally hundreds of thousands of people every day. >> reporter: but even in germany, a country praised for carrying out mass testing, the infection rate has recently gone up. though scientists say they don't know how significant that is. holly williams, istanbul. >> china's shanghai disney reopened this weekend after a three-month shutdown. the theme park experience now includes temperature screenings, sanitizer stations, and new rules for social distancing. ramy inocencio has the story. >> reporter: mickey and minnie mouse took the stage as a band played while a cast of other well-known disney characters greeted thousands of guests all arriving for the park's official reopening since it closed in

january. but in a post-pandemic era, a different experience awaits visitors. to enter shanghai disneyland now, infrared cameras with facial recognition software scan each person for possible fever. a personalized qr code shows up on each person's smartphone. only those with green codes are allowed in. once inside, social distancing is obvious everywhere. yellow tape or paint on the ground guides visitors to keep at least 3 feet of distance between each other. tables are cordoned off at restaurants that accept contactless payment. no cash. many of the most popular rides launch half full. and the precautionsonto th socialwoers ntinuously spray disinfectant and hand sanitizer can be found almost everywhere. but some of the park's most popular attractions are still dark, including the main street parades, concerts, and the nightly fireworks show. and with attendance capped at about a third of the park's

capacity, some guests say they welcome the changes. >> we don't have to worry about people stepping on the kids and you also don't have to worry about people cutting in line. >> reporter: the same is true here at tokyo disneyland. the gates are shut and mickey and minnie and literally everyone else is nowhere to be found. japan's state of emergency has been extended to the end of this month. but in orlando there are signs of life. disney springs, which is an outdoor entertainment and shopping complex, is set to start a phased reopening on may 20th. ramy inocencio, tokyo. motorcycle riders love the open road. and geico loves helping riders get to where they're going, so to help even more, geico is giving new and current customers a fifteen percent credit on their motorcycle policies

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all that heavy snow this winter in the rockies and sierra nevada should be melting now and filling the vast reservoirs of the american west. instead the reservoirs remain at dangerously low levels. and as john blackstone reports, it's a problem that's been building for years. >> reporter: springtime is when reservoirs across the american west should be full. this year, as in many years past, they are not. >> lake powell, the colorado river, big white bathtub rings around them, left as the water declines. there is' less water in the

system now than there was 20 and 30 years ago. >> reporter: john flack, author of "water is for fighting over" has spent decades studying the colorado river, a crucial source of water in much of the west. >> the persistence of the drought conditions in the colorado river basin especially is essentially unprecedented in human history. >> reporter: what is happening, a new study says, is not just a drought. it's a megadrought. it's a pretty dramatic term, megadrought. >> if you go back in time 500 years or so, there were these phenomenal droughts in terms of both severity and in terms of length. until recently those droughts have always been spoken about with almost a mythical-type character. >> reporter: park williams is lead scientist on research that uses tree ring evidence going back 1200 years to study megadroughts that lasts as long as 40 years. >> and the drought of the last 20 years has developed the same way the megadroughts did. >> reporter: there is, however,

one difference between this long drought and the megadroughts centuries ago. >> what we're seeing today is a combination of natural climate variability as well as human cause climate change. >> we would have a drought even without climate change, climate change is making it a whole lot worse? >> without human cause, climate change we'd still are a drought but it wouldn't be as serious as the one we've actually seen. >> reporter: 75% of the west's water supply begins as snow. >> when you get a big snow pac, you hope it will fill up your reservoirs. with climate change it doesn't fill them up as much as it would have without the warmer temperatures. >> reporter: in the mountains above boise, idaho, scientist peter marshall is developing better ways to determine how much water there is in the snow pac. >> it's becoming more challenging for us to not only predict how much water is going to enter our reservoirs, but also the ability to store that water all the way through the end of the summer for

agriculture and water resource purposes. >> reporter: marshall is part of a nasa project called snow x, developing remote sensing equipment to get accurate snow pac measurements from space. >> so one of the big pushes for us to develop a space-borne approach to monday torning snow water resources is because these patterns are changing. so we're really needing a approach that maps the amount of water that's stored within the snow pac. >> over the past couple of decades, we've had a few years of drought, and then we sometimes have record snow, record rain flooding. it looks like the drought is over. >> the thing that's changing now is that when we do have those wet years, when we do get a good snow pack up in the mountains over the winter, we're seeing less water make it into the rivers and downstream to the farms and the cities and the fish and the eco systems that depend on that water. >> reporter: planning water use will become even more crucial if, indeed, the west is in the

midst of a megadrought that

this morning we're remembering the life and music of the legendary performer little richard. he died this weekend after a long battle with bone cancer. little richard was 87. anthony mason has this tribute. ♪ ♪ >> reporter: with the unforgettable opening lyric to his smash hit tutti fruity, little richard crashed the pop charts like a force of nature in 1956. no one had ever heard anything like him. ♪ ♪ ♪ she's the gal that i love best ♪ ♪ >> reporter: including a man who found fame with creed enclearwater. john fogarty got to perform with little richard at the grammys in '48. >> he had that grip, that edge he sang with. ♪ ♪

>> reporter: born richard penniman in macon, georgia, as little richard he developed a high-energy stage act. >> he was just over the top wild, flamboyant. >> reporter: the black keys, dan auerbach. >> if you like the black keys, you were all that to little richard. >> reporter: producer quincey jones hailed richard as an innovator whose influential is seen from jengenres from gospel hip-hop. raised in a christian home, his boot leger father was killed. leaving him to an attraction of men. he spoke to ed bradley in 1985. >> there must have been a stigma attached to that in those days. >> i was called everything but an urban sandwich. people wanted to knock me down.

>> reporter: when he first started touring in the mid 1950s, he told rolling stone magazine he faced such severe racism, he was forced to sleep, eat and dress in his car. but ultimately, he said, his shows started bringing black and white audiences together. >> everywhere i would go in the south, alabama, north carolina, kentucky, mississippi, arkansas -- they started falling in line, you know, with my music. ♪ ♪ >> reporter: little richard would call himself the innovator. the originator and the architect of rock and roll.ll. it was no exaggeration. >> i would say, you know how you boys and girls out there, if you ever dare to try and do rock and roll, you better go look up little richard and see how it's done. ♪ ♪ >> wt th voice. and that's the overnight news for this tuesday.

reporting from the nation's capitol, i'm kris van cleave. ♪ ♪ captioning sponsored by cbs >> o'donnell: tonight, the white house on edge. the new safety measures inside the west wing. the president orders everyone to wear masks after two aides test positive for the virus. those close to president trump are being tested daily, but how accurate are the tests? and why three doctors: the c.d.c. director, the head of the f.d.a., and dr. anthony fauci, are self-isolating. crowded spaces-- a colorado restaurant packing in customers on mother's day is shut down. and tonight, an image of an almost-full plane sparks united to change its social distancing .olicy. alert to parents.