The early winter chill is affecting residents and travellers in northern India, particularly in Himachal Pradesh's higher reaches, where sub-zero temperatures pose risks of frostbite and hypothermia. In Delhi, the colder-than-usual October temperatures may lead to increased energy consumption for heating and discomfort for those without adequate winter clothing. The upcoming western disturbances could bring thunderstorms and lightning to isolated areas, potentially disrupting travel and outdoor activities.