if things start falling, evprecaution you ca can take is a good one. the kids enjoyed it. it was kind of a game. >> cdc says they don't have research available in the effect of helmet use during tornados. they say it's important not to waste time searching for a helmet during a tornado, get some place safe, fast. >>> you can get colds from sandwiches left over. what researchers have to say about asthma at work. >>> it's hot and sticky out. >> we need more detail going about how much or when, how much heat and when it breaks. we will talk about it coming up. . >>> turning to tonight's health alert. we know long hours at work can be bad for you. part of that could be the air we breathe at work. 9% of all asthma cases in the country are made worse by workplace environments. for nearly 50 million americanses ringing in the ears is something they deal with everyday. treaments are available, most are not considered affective. researchers treated one group of tee nigh 'tis -- teenitis suffers. the group that experienced counseling stuffed no side effects. on average weightlines h