he s pleading with people not to let their guards down this thanksgiving. how do you space everybody out? who prepares the food? it gets very complicated, and people tend to let down those defenses when they re with family. reporter: tonight, the governors of california, oregon, and washington issuing a holiday travel advisory. urging visitors to quarantine for 14 days and avoid in-person gatherings. health experts say even if you are indoors, wear a mask. we don t want this to become another set of superspreader events. reporter: norma flowers died from covid in july. her daughter glenda now making this plea. don t have big gatherings because it s you d rather lose one thanksgiving and share all the rest of them with your family. reporter: their family gatherings usually include dozens of people. not this year, says glenda s sister kristine. we look forward to the next thanksgiving to where those hugs will feel even better. reporter: david, the clock is ticking if yo