Fleas have different temperature tolerances depending on their life stage. Adult fleas die at temperatures colder than 46.4°F (8°C) and hotter than 95°F (35°C) . Immature fleas, which include flea eggs and larvae, are slightly more susceptible to the cold, dying at temperatures below 55.4°F (13°C) . At temperatures below freezing, adult fleas will die even quicker, within five days of exposure at temperatures of 30.2°F (-1°C) . During winter, adults can survive on warm-bodied hosts, such as dogs, cats, raccoons, or opossums, and fleas living within heated homes will survive. However, it can take up to five days of consistently below freezing temperatures to kill an adult flea. Fleas cant survive the laundering process, so washing clothing and bedding for 10 minutes at 140°F is recommended to kill fleas. High heat settings on both the washer and dryer are recommended for complete eradication of fleas. Fleas cannot survive in temperatures above 95°F (35°C), and they will die within two days at this temperature unless relative humidity exceeds 75% .