Calm seas in recent days have brought a new wave of refugees attempting the treacherous sea crossing from Libya to Italy, forcing the rescue of 6,500 people in 40 separate operations on Monday alone, according to Italy\u0026#039;s coast guard.On Sunday, 1,100 migrants were rescued from sinking boats, the Italian coast guard said.\u0022The refugees, believed to be mostly from Somalia and Eritrea, were on flimsy rubber dinghies that become highly unstable in high seas,\u0022 Al Jazeera reports.The Mediterranean rescue mission of Doctors Without Borders/Médecins Sans Frontières (MSF), which took part in the rescue operations on Monday, tweeted heartbreaking photos from the day:UPDATED: 6500 #people were rescued from 40 boats yesterday. It\u0026#039;s 2016 \u0026amp; there is still no safe way to flee #Libya. pic.twitter.com/MsOr6t0qPV— MSF Sea (@MSF_Sea) August 30, 2016We\u0026#039;re not new to this but seeing this little guy, his twin brother \u0026amp; his mum rescued was heartbreaking. #SAFEPASSAGE pic.twitter.com/fTcU1mHTwr— MSF Sea (@MSF_Sea) August 30, 2016This man, rescued by the #Dignity1 became a single father to a newborn when his wife died in #Libya. pic.twitter.com/ekHCILMzTM— MSF Sea (@MSF_Sea) August 30, 2016No one risks their life at sea for the chance to live off £36.95 a week in the UK pic.twitter.com/0KDl87YW6M— MSF Sea (@MSF_Sea) August 30, 2016Five-day-old twins were among those rescued, according to MSF, and were immediately airlifted to an Italian hospital upon arrival.\u0022The Italian coastguard predicted that weather conditions would encourage the departure of further boats on Tuesday,\u0022 Middle East Eye reports, adding that more than 3,000 people have died attempting the sea crossing from Libya to Italy so far this year—an increase of more than 50 percent from this time last year, according to the International Office of Migration.Refugees are detained and face dire conditions and human rights abuses in Libya, the Independent notes: \u0022Rights groups say 3,500 [refugees] are being held in around 20 official detention facilities across Libya, with many more detained in informal detention centers run by criminal gangs.\u0022The United States began bombing Libya again and launched a new ground campaign in the country earlier this month, a move widely condemned by antiwar activists and peace groups. It is unclear whether the U.S. offensive in Libya is linked to this latest wave of migration from the country to Europe.