Historic & Scenic Sites in and around Washington County, MO by Esther & Gene Carroll History of Washington County Jails & Courthouses by Esther Carroll These links are a part of Carrolls' Corner - lots of Washington County History!
In a humid environment, over 60% of newly hatched fleas can live without a host for 2 months. In a cool, dry environment, only 10% will live without an immediate host. Humidity is the key to flea survival.
Adult Fleas. Temperatures below freezing are lethal to adult fleas . Theyâll die within five days at 30.2Â°F (-1Â°C) Fig 2. At 24 hours, thereâs mortality in 20% of emerged adults and 72% of pre-emerged adults. Fleas can live up to ten days at 37.4Â°F (3Â°C).