The "football mad" former Tottenham boss, 70, has been hired by Birmingham's Hong Kong-based owners in a desperate bid to avoid relegation from the Championship following Gianfranco Zola's resignation with just three games remaining.
Zola recorded just two victories during his time at St Andrews', which came to an end on Monday, after a 2-0 defeat to Burton Albion left the Blues just three-points above the relegation zone.
Birmingham's season began promisingly under new Derby manager Gary Rowett, who had taken them into contention for promotion before unexpectedly being sacked and replaced by Zola.
Harry Redknapp will take charge of Birmingham's last three games of the season.
1st tropical depression of 2017 forms far from land
Forecasters said no more strengthening is expected, and the depression should be absorbed by an extratropical low in a day or so. Hurricane season runs from June 1 to November 30, but previous year two storms formed before the official start of the season.
It's a real challenge.
'I am sorry because I came to Birmingham with huge expectations.
Redknapp's most recent job was a short stint as manager of Jordan.
He took charge of Jordan for two World Cup qualifiers a year ago, and worked as an adviser to Derby County last season.
Floyd Mayweather vs. Conor McGregor: UFC's Dana White projects ginormous paydays
The UFC star is also open to the idea of fighting the undefeated boxer and the pair have already been involved in a war of words. That was only the reported fight purse, but $75 million from a single bout will be a massive jump in revenue for McGregor .
"I was anxious how I was going to find a centre half among the jockeys with them all being so small. If I can just get them going and get a bit of belief back into them and we can pick up a win or whatever we need to stay up - that's all I can do". I got a phone call last night from the people at Birmingham.
"The players have put in the club in the position they're in - you can blame who you like, they've obviously not performed", said the ex-Portsmouth, West Ham and Tottenham boss.
"It's not easy. All I can do is try and install some confidence - two wins in 22 games is there for all to see".
Harry Redknapp on Tuesday April 18, 2017 was hired as coach of struggling second-tier team Birmingham, marking his return to English soccer management after a two-year absence.
Borussia Dortmund bus attack could have been deadly, German Police confirm
Bartra was the only player to receive injuries of any kind, but has been released from hospital after being successfully operated. Such military-grade detonators could only have been wired by an individual with "professional skills", the official said.