Sydneysiders concerned for the plight of homeless people exposed to the savage weather striking the city have been moved to contact charities in an effort to help.

Homeless agencies and shelter providers say they have experienced a huge spike in the demand for beds and crisis accommodation as wild weather continued to rip through the city.

Homeless agencies and shelter providers say they have experienced a huge spike in the demand for beds and crisis accommodation as wild weather continued to rip through the city. Credit:Andrew Quilty

The Salvation Army said the number of homeless people sleeping in bus shelters, underneath building awnings and doorways had increased since Monday when strong winds and torrential rain struck the city, swelling numbers in the city's homeless shelters.