Audible Alarm For Increased Temperature

int temppin=A0;
float temp=0;
int Buzz=A1;
void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
pinMode(Buzz,OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
temp=analogRead(temppin);
temp=temp*0.48828125;
Serial.println(temp);
delay(1000);
if (temp>30)
{digitalWrite(Buzz,HIGH);}
else
{digitalWrite (Buzz,LOW);}
}