THE SKY'S ON FIRE (Sat., July 15, ABC) TV-PG: LV Quick: L.A. is about to fry thanks to a huge hole in the ozone. What do you do? If you're mayoral aide Josie Bissett, you toss that flaxen hair and run for cover as birds and bugs, crazy from the heat, bombard you. If you're eco-geek scientist John Corbett, you maintain your sexy stubble while building a bomb that may save the coast from becoming toast. And if you're the viewer, you avoid the harmful rays of this screamingly bad disaster flick with plot holes bigger than anything in the ozone. This Sky's not on fire, folks. It's just reheated fluff being burned off in the summer. My score (0-10): 1