You can always use a gas range top during a power outage, just light manually. The new gas ovens can not work during an outage probably because the temperatures are set electronically.
i havent seen any in white ,unfortunatley the companies seem to think everyone only wants stainless now ,but it is a fantastic oven i can cook my roast beef in the top oven then the roASTIES AND YORKSHIRE PUDDINGS AT A HIGHER TEMP IN THE BOTTOM