The BBC Turkey correspondent has just travelled from Izmit to Golcuk on the Sea of Marmara, one of the places most seriously affected by the earthquake.
Thousands of people are still thought to be buried there.
Our correspondent says rescue teams are desperately needed; he saw only a few bulldozers working in the ruins, and some people told him they had received no help at all, more than thirty hours after the earthquake struck.
Many survivors were still digging with hands and shovels; one young man said; "We can see the bodies, but we can't get to them." Our correspondent says that time is of the essence, although some people are still being brought out alive.
The road into Golcuk is a huge traffic-jam, with many people leaving, but even more on their way in to try to search for those missing.
From the newsroom of the BBC World Service
Country profiles
Violence greets Clinton visit
Russian forces pound Grozny
EU fraud: a billion dollar bill
Next steps for peace
Cardinal may face loan-shark charges
Vodafone takeover battle heats up
(From Business)
Trans-Turkish pipeline deal signed
French party seeks new leader
Jube tube debut
Athens riots for Clinton visit
UN envoy discusses Chechnya in Moscow
Solana new Western European Union chief
Moldova's PM-designate withdraws
Chechen government welcomes summit
In pictures: Clinton's violent welcome
Georgia protests over Russian 'attack'
UN chief: No Chechen 'catastrophe'
New arms control treaty for Europe
Mannesmann fights back
(From Business)
EU fraud -- a billion-dollar bill
New moves in Spain's terror scandal
EU allows labelling of British beef
UN seeks more security in Chechnya
Athens riots for Clinton visit
Russia's media war over Chechnya
Homeless suffer as quake toll rises
Analysis: East-West relations must shift