doug mcconnell has that tonight. >> we want to understand how redwoods respond to climate, because that'sctate if they continue to survive where they are today. and it's going to tell us where they're going to grow successfully in the future. >> reporter: climate is changing. these redwoods near santa cruz rely on fog for much of their water. but the number of foggy days along the california coast is down about 30% in the past 50 years. if that trend continues, can these redwoods we love so much survive where they're standing? and in what condition? and where can we protect them? >> we want to know where redwoods are most likely to do well in the future. we can set up parks around those areas in particular. >> reporter: to predict the future for redwoods and where and how toe protect them, scientists are climbing into the upper reaches of towering trees to learn how these giants have responded to climate changes in past centuries. the scientists are documenting the health of these trees today. revisiting them regularly to see how they respond to changing conditions. it's part of a long in

we're going to get there because people want to explore. >> reporter: doug mcconnell, nbc bay area news >> now, the navy is working on a massive project to remove contamination on the hanger one and should be completed by the spring of 2012. >> so doug traded in his jeep? >>> still ahead at 6:00, the next age of space exploration taking flight here in the bay area. >>> i'm scott budman and you're right, raj. perhaps nasa handing offhe t batton to technologists. next. >>> what arnold schwarzenegger won't pay for in his divorce from maria shriver. >>> and good evening, i'm chief meteorologist jeff raineer ynie. hot in the east bay. san jose airport hitting 83 and san francisco, 65. it's starting to cool off at the coastline. details on how long the warm air will stick around coming up. i know you're worried about making your savings last and having enough income when you retire. that's why i'm here -- to help come up with a plan and get you on the right path. i have more than a thousand fidelity experts working with me so that i can work one-on-one with you. it's your green line. but i'll

as "today in the bay's" doug mcconnell reports, you could be the redwood's last chance for survival. >> we want to understand how redwoods respond to climate because climate is going to dictate if redwoods continue to thrive where they are today and it's going to tell us where the redwoods are going to grow successfully in the future. >> climate is changing. these thirsty redwoods near santa cruz rely on fog for much of their water but the number of foggy days along the california coast is down about 30% in the past 50 years. if that trend continues, can these redwoods we love so much survive where they are standing and in what condition and where can we protect them? >> we want to know where redwoods are most likely to do well in the future and we can set up reserves and parks around those areas in particular. >> to predict the future for redwoods and where and how to protect them, scientists are now climbing into upper reaches of towering trees to learn how these giants have responded to climate changes in past century. the scientists are also documenting the health of these trees

we can do that here. >> reporter: doug mcconnell, nbc, bay area news.t would be great if they can do it. so many parks at risk right now. >> 70. >>> want to check in with jeff. pretty nice weather. a little toasty in some spots. >> it's warm. fog is still holding off, you guys. i know every year it's kind of that delicate balance. is the fog going to move in before the fireworks go up in san francisco? we'll have your forecast coming up in a few minutes, the seven-day, with some big changes. >>> the padres look to rain on the giants' holiday parade. ev> plus, let the gorging hery dog has its day. but july fourth is joey chesnutt's day on coney island. good eats, just ahead. >>> and welcome back. we're going to turn it over to jeff ranieri in just a minute to give us a fourth of july forecast. jeff, your color palette on the maps, i'm loving reds and fuchsias. >> blue coming in. you're right. it is a lot of orange. a lot of reds coming our way. the thing we're monitoring right now is the fog. we always seem to have it rolling this time of the year right