In an emergency, call 112.
If a Swedish citizen needs social assistance in Iceland, they should contact the social services office, Félagsþjónustan, in the municipality where they reside. In Reykjavík, there is a main office that can be contacted if you are not a resident of Iceland:
Þjónustumiðstöð Miðborgar og Hlíða,
Address: Laugavegur 77, 101 Reykjavík
Phone: +354 411 1600; +354 411 1111
If you have private travel insurance, contact your insurance company.